G(iant) version of all viruses have twice the amount of HP & their attacks deal double the damage of their smaller counterparts. Giant viruses can never yield battle cards.

Note: While it would make the most sense to simply translate the location names, some people are still going to get confused so instead, I will take a different approach in naming the virus locations

Mettrio Group
Mettrio - 40HP (Found in any of Kodama Town's wave roads)
Mettrio2 - 90HP (Found in the school wave roads)
Mettrio3 - 130HP (Found in the Garbage Accumulation Center wave roads or the junk yard areas after)

Attacks: Ground Wave - A shockwave that fires down the column. Causes temporary invincibility when hit by this attack. (10/30/50)
Cards: Ground Wave 1, 2, 3
Movement: normal

Name meaning: "Mett" refers to "Mettool", the oldest enemy in all of Rockman.

Cannobase Group
Cannobase - 50HP (Found in any of Kodama Town's wave roads)
Megabase - 100HP (Found in the 1st floor & 2nd floor hallway wave roads at the school or in classroom 1-B's wave roads)
Gigabase - 160HP (Found in the last junk yard wave roads or in the 2nd station security network on the Space Station Kizuna)

Attacks: Power Bomb - Fires a bomb down the column. Cannobase strikes a single panel, Megabase explodes in a + pattern, Gigabase hits a 3x3 area. Causes temporary invincibility when hit by this attack. (10/30/70)
Cards: Power Bomb 1, 2, 3
Movement: none

Name meaning: "Base" refers to how the virus is a turret. "Canno" = Cannon while "Mega" and "Giga" often refer to higher levels.

Meramander Group (fire)
Meramander - 80HP (Found in the Denpa Udai wave roads or inside the Truck Network from Ox Fire's scenario)
Meralizard - 120HP (Found in the 2nd & 3rd School Network for Libra Balance's scenario or the Video Deck network in the same room)
Meraleon - 170HP (Found in the second area of the Space Station's wave roads or the second station security network accessed from the same room)

Attacks: Tail Burner - A three panel long flamethrower. Causes temporary invincibility when hit by this attack. (15/50/70)
Cards: Tail Burner 1, 2, 3
Movement: Warp

Name meaning: "Mera" comes from "meramera" which refers to the characteristics of a raging fire. Mander/Lizard/Leon refer to salamanders, lizards, and chameleons respectively.

Moe Roader Group (fire)
Moe Roader 60HP (Found in the Truck Network from Ox Fire's scenario)
Moe Motor 130HP (Found in Yashibu Town's wave roads of the second Anaconda Robo Network)
Moe Biker 180HP (Found in the second station security network or Uchuukuukan no Denpa 3)

Attacks: Hot Drive - The virus will attack by constantly driving up & down its column & will damage you on contact. Causes temporary invincibility when hit by this attack. Breaks shields. (20/40/60)
Cards: Moe Ring 1, 2, 3
Movement: Normal

Name meaning: "Moe" refers to burning while Roader/Motor/Biker refer to how the virus looks like a motorized unicycle.

Nai-Nai Group
Nai-Nai - 100HP (Found either in the indoor or outdoor Amaken wave roads)
Naiyura - 130HP (Found in the gym wave roads of the networks of classrooms 1-A & 1-B)
Naibell - 160HP (Found in the 1st area of the Space Station Kizuna's wave roads or in the station security network accessed from the same room)

Attacks: Ghost Pulse - Fires a pulse shot down the column that causes confusion. (5/10/20)
Cards: Ghost Pulse 1, 2, 3
Movement: Float

Name meaning: N/A

Birii Ace Group (elec)
Birii Ace - 70HP (Found in the outdoor Amaken wave roads or the Science Pavilion wave roads)
Birii King - 120HP (Found in classroom 1-A, 1-B, & 5-A's wave roads)
Birii Joker - 170HP (Found in the 1st station security network or the Space colony network)

Attacks: Thunder Ball - Fires an electric sphere that tracks the column you are on slowly & moves ahead one row at a time. Causes paralysis. (10/20/50)
Cards: Thunder Ball 1, 2, 3
Movement: Float

Name meaning: "Birii" is the name of the viruses from the EXE series that granted the Thunder Ball battle chip. Ace/King/Joker refer to playing cards.

Plumin Group (aqua)
Plumin - 60HP (Found in Amaken's indoor wave roads or on the Science Pavilion wave roads)
Pluppo - 100HP (Found in the 3rd school network of Libra Balance's scenario or the 2nd floor hallway speaker network at the school)
Plupon - 150HP (Found in the 1st station security network or Uchuukuukan no Denpa 1)

Attacks: Wide Wave - Fires a three panel wide water wave. Causes temporary invincibility when hit by this attack. (10/30/50)
Cards: Wide Wave 1, 2, 3
Movement: Jump

Name meaning: N/A

Croakker Group
Croakker - 80HP (Found in the 1st pseudo-space network or the P&a network)
Crocket - 110HP (Found in 103 Department rooftop wave roads or the event center wave roads accessed from the 103 rooftop)
Crowvass - 160HP (Found in the Garbage accumulation center wave roads or the 1st station security network)

Attacks: Bird Arrow - The virus charges down the column. Causes temporary invincibility when hit by this attack. Breaks shields. (30/50/80)
Cards: Jet Attack 1, 2, 3
Movement: Warp + Float

Name meaning: All three contain a pun on the word "Crow". "Crocket" in particular, refers to how the virus is also similar to a rocket.

Monosword Group
Monosword - 100HP (Found in Amaken's outdoor wave roads of the Science pavilion wave roads)
Monoswordin - 140HP (Found in 103's 1st Floor wave roads or 103 Department's rooftop wave roads)
Monoswordeal - 180HP (Found in 1st & 2nd area of the Space Station Kizuna Wave roads)

Attacks: Brave Sword - Warps from its location down to row, releases its Stone Body, & attacks a single panel with a sword slash. Causes temporary invincibility when hit by this attack. (30/60/90)
Cards: Brave Sword 1, 2, 3
Movement: None (will only warp to the row in front of yours to attack)

Note: While stone body is activated, this virus group will take only one damage from all attacks except breaking attacks, which will deal double damage as if the virus were frozen in ice.

Name meaning: "MonoSword" refers to how the virus resemble a person (mono) bearing a sword. "Swordin" is a portmanteau of "Sword" and "Paladin".

Shishi Kashu Group
Shishi Kashu - 80HP (Found in Kodama Town's wave roads)
Shi-Singer - 90HP (Found in Amaken's indoor & outdoor wave roads)
Shishi Diva - 110HP (Found in the school broadcast studio wave roads or the 1st floor hallway speak network at the school)
Shishi Opera - 120HP (Found in the dresser, Crepe vendor, or clothes vendor networks)
Shishi Classic - 180HP (Found in the Uchuukuukan no Denpa 1 & 2)

Attacks:
-Power Song: Grants invincibility to allied viruses. Used by Shishi Kashu.
-Quake Song: (I dunno...I've never seen it used & I don't use the battlecard myself) Used by Shi-singer
-Trip Song: Causes confusion when the song is playing. Used by Shishi Diva.
-Love Song: Causes HP to drain when the song is playing. Used by Shishi Opera.
-Blind Song: Causes blindness when the song is playing. Used by Shishi Classic.
Cards: Power Song, Quake Song, Trip Song (respectively. The last two viruses will yield any of the three)
Movement: Warp

Name meaning: "Shishi" means lion. "Kashu" means an alto singer.

Death Count Group (fire)
Death Count - 130HP (Found in Kodama Town's wave roads or Luna's estate's wave roads)
Death Bomber - 160HP (Found in the the Dream Island or Dream Island Park wave roads)
Deathplosion - 200HP (Found in Uchuukuukan no Denpa 1, 2, & 3)

Attacks: Count Bomb - The virus drops a bomb on the second row that will explode in a 3x3 pattern. The bomb explodes after three seconds. Causes temporary invincibility when hit by this attack. (30/50/100)
Cards: Count Bomb 1, 2, 3
Movement: Warp

Name meaning: "Deathplosion" is a portmanteau of "Death" and "Explosion", refer to its method of attack.

Bell Gong Group
Bell Gong - 130HP (Found in the Kodama Town wave roads or the wave roads of Subaru's room)
Bell Judge - 160HP (Found in the 1F speaker network or piano network at the school)
Bell Boxer - 190HP (Found in Uchuukuukan no Denpa 1, 2, or 3)

Attacks: Boxer Hook - The virus will warp in front of you & either attack with a punch attack or feint the attack & ring a gong. Causes temporary invincibility when hit by this attack. (20/40/70)
Cards: Synchro Hook 1, 2, 3
Movement: Warp + Float

Name meaning: "Bell" refers to the sound the virus makes while a gong/judge/boxer are all present during a boxing match.

Octarin (aqua)
Octarin - 100HP (Found in the 2F hallway wave roads at the school or Classroom 1-A's & 5-A's wave roads)
Ice Octarin - 140HP (Found in the Dream Island Park wave roads or the final junkyard area wave roads)
Poison Octarin - 180HP (Found in the 3rd station security network or Uchuukuukan no Denpa 1 & 2)

Attacks:
-Green Ink: Used by Octarin. A cloud is blasted down the column & will change the panels it passes over to kusa/grass. Causes temporary invincibility when hit by this attack. (40)
-Blue Ink: Used by Ice Octarin. A cloud is blasted down the column & will change the panels it passes over to ice. Causes temporary invincibility when hit by this attack. (70)
-Purple Ink: Used by Poison Octarin. A cloud is blasted down the column & will change the panels is passes over to poison. Causes temporary invincibility when hit by this attack. (100)
Cards: Green Ink, Blue Ink, Purple Ink
Movement: Float (though it doesn't actually move from its panel)

Note: While the members of this group are aqua type viruses, their attacks don't deal aqua damage.

Note: "Oct" is short for Octopus. Ice/Poison refer to the panels that the virus lays.

Goro Bolta Group (elec)
Goro Bolta - 100HP (Found in the 1F hallway wave roads, Classroom 1-A wave roads, & Classroom 1-B wave roads, all at the school)
Goro Spark - 140HP (Found in Dream Island & Dream Island Park's wave roads)
Goro Thunder - 170HP (Found in the 3rd station security network & Uchuukuukan no Denpa 2)

Attacks: Cloudy Bolt - The virus will move into your area & hit all panels surrounding it with electricity. Causes temporary invincibility when hit by this attack. (30/70/90)
Cards: Cloud Shoot 1, 2, 3
Movement: Float

Name meaning: "Goro" refers to "gorogoro", the sound of thunder. (Also, Cloudman had an attack called Goro Thunder)

Iwaganko Group (fire)
Iwaganko - 120HP (Found in all areas of the school network from Libra Balance's scenario)
Yamaganko - 160HP (Found in the garbage disposal furnace network & the sunken ship network accessed from Dream Island Park's wave roads)
Mineganko - 230HP (Found in the 3rd station network & Uchuukuukan no Denpa 1 & 3)

Attacks: Magma Bazooka - Fires a cannonball all the way to your row. The ball becomes a fiery explosion that hits three panels wide from the impact panel. Causes temporary invincibility when hit by this attack. (50/100/150)
Cards: Fire Bazooka 1, 2, 3
Movement: None

Name meaning: N/A

Sawanigaa Group (aqua)
Sawanigaa - (Found in all areas of the school network from Libra Balance's scenario)
Kawanigaa - (Found in Dream Island's wave roads of the small boat network accessed from the same area)
Uminigaa - (Found in the 3rd station security network in space or Uchuukuukan no Denpa 3)

Attacks: Aqua Bubble - Fires a bubble down the column. Causes temporary invincibility when hit by this attack. (20/40/70)
Cards: Chain Bubble 1, 2, 3
Movement: Normal

Name meaning: Sawanigaa refers to a swamp crab. Kawanigaa refers to a river crab. Uminigaa refers to an ocean crab.

Moaian Group
Moaian - 160HP (Found in Yashibu Town's wave roads or the 103 Department rooftop wave roads)
Stonehead - 220HP (Found in the small boat network or recycled fridge network, both accessible from Dream Island's wave roads)
GiantFace - 280HP (Found in the 4th space station security network or Uchuukuukan no Denpa 2 & 3)

Attacks: Bound Moai - The virus' head will detach & roll over two columns to attack its enemy. Causes temporary invincibility when hit by this attack. Breaks shields. (100/130/150)
Cards: Moai Fall 1, 2, 3
Movement: None

Name meaning: N/A

Nevarra Group (aqua)
Nevarra - 100HP (Found in Yashibu Town's wave roads & 103's 1F wave roads)
Betarra - 140HP (Found in the 4th area of the Space Station Kizuna's wave roads or the view monitor network in the same area)
Nucharra - 180HP (Found in the 4th station security network or Uchuukuukan no Denpa 1 & 3)

Attacks: Never Rain - A blast of water is shot up & l&s on your current position. Causes temporary invincibility when hit by this attack. (30/50/80)
Cards: Never Rain 1, 2, 3
Movement: Underground

Name meaning: N/A

Hotarou Group (elec)
Hotarou - 100HP (Found in all areas of the Anaconda Robo network)
Hotariin - 130HP (Found in 2nd junk network for Gemini Spark's scenario & the space suit network onboard the Space Station Kizuna)
Hotarigga - 160HP (Found in the 4th space station security network & Uchuukuukan no Denpa 2)

Attacks:
-Hotaru Geri: The virus will warp in front of you & attack with a firefly kick. Causes temporary invincibility when hit by this attack. (50/70/80)
-Hotaru Flash: The virus will begin to glow before causing a big flash, rendering you blind if you don't have a barrier or aura up.
Cards: Hotaru Geri 1, 2, 3
Movement: Warp + Float

Name meaning: "Hotaru" means firefly.

Mojahei Group (wood)
Mojahei - 130HP (Found in the event center wave roads or all areas of the Anaconda Robo network)
Mojagunsou - 180HP (Found in the boat network accessed from Dream Island's wave roads or the spacesuit network accessed from the 1st area the space station)
Mojagensui - 240HP (Found in the 4th station security network & Uchuukuukan no Denpa 1 & 3)

Attacks: Moja Lance - The virus will rush forward & attacks three panels ahead with its lance.
Cards: Moja Lance 1, 2, 3
Movement: Normal

Name meaning: "Moja" refers to "Mojamoja", or shaggyness. "Mojahei" means "shaggy soldier", "Mojagunsou" means "shaggy sergeant", and "Mojagensui" means "shaggy general".

Kabu Horn Group (wood)
KabuHorn - 160HP (Found in all areas of the Anaconda Robo Network)
KabuHammer - 210HP (Found in the view monitor network accessed from the 4th area of the Space station)
KabuGrand - 270HP (Found in the 4th space station security network or the air module accessed from the 2nd area of the space station)

Attacks: Wood Horn - The virus will shove its large horn forward to attack a single panel on its column. Causes temporary invincibility when hit by this attack. Breaks shields. (50/90/130)
Cards: Jumbo Hammer 1, 2, 3
Movement: Warp

Name meaning: "kabu" is short for "Kabuto", which means helm. The second part of the name refers to their weapon.

Uringa Group (wood)
Uringa - 150HP (Found in Dream Island's wave roads & Dream Island Park's wave roads)
Uringuru - 220HP (Found in 1st area of the space station's wave roads or the service module network accessed from the same area)
Uringoraa - 260HP (Found in all three areas of the Uchuukuukan no Denpa)

Attacks: Vulcan Seed - The virus will fire seeds down the column multiple times. (10x7/10x10/10x13)
Cards: Vulcan Seed 1, 2, 3
Movement: None

Name meaning: "Urin" refers to a rainforest.

Junkness Group
Junkness - 130HP (Found in the Garbage Accumulation Center wave roads & all the junkyard networks for Gemini Spark's scenario)
Junkness2 - 160HP (Found in the Island Underground's wave roads or Uchuukuukan no Denpa 2)
Junkness3 - 200HP (Found in Uchuukuukan no Denpa 2)

Attacks:
-Junk Cube: Lays a junk cube on the battlefield. If you walk in front of it, it will be pushed towards you. Causes temporary invincibility when hit by this attack. Breaks shields. (30/50/70)
-Count Bomb: Lays a count bomb on the battlefield that explodes in a 3x3 area after three seconds unless it is destroyed. Deals fire damage even though the virus has no element. Causes temporary invincibility when hit by this attack. (30/50/100)
-Stone Cube: Lays a 200HP Stone Cube on the field to block attacks with.
Cards: Junk Cube 1, 2, 3
Movement: Warp

Name meaning: "Junk-ness" refers to the fact that the virus is composed of junk.

Nukkii Group (wood)
Nukkii - 120HP (Found in the 1st & 3rd junkyard networks of Gemini Spark's scenario & Uchuukuukan no Denpa 3)
Manenukkii - 150HP (Found in the last area of the space station's wave roads & ab&oned residential module drifint in space, accessible from the same area)
Bakenukkii - 210HP (Found in Uchuukuukan no Denpa 1 & 3)

Attacks: Henge Sword - When attacked, the virus will retaliate by warping in front of you while transforming into Rockman & attacking with a sword. Causes temporary invincibility when hit by this attack. Nukkii uses a normal wood-element sword, Manenukkii attacks with Long sword range, & Bakenukkii attacks with Wide sword range. (80/90/110)
Cards: Henge no Jutsu 1, 2, 3
Movement: Warp

Name meaning: "Nukkii" is a pun for "tanuki", a shapeshifting raccoon dog from Japanese folklore. "Mane" refers to imitation while "bake" refers to a disguise.

Big Reapa Group
Big Reapa - 190HP (Found in all the junkyard networks from Gemini Spark's scenario)
Big Great - 240HP (Found in the 3rd area of the space station's wave roads & Uchuukuukan no Denpa 2)
Big Kaiser - 300HP (Found in Uchuukuukan no Denpa 1 & 2)

Attacks: Big Axe - The virus moves closer to you & attacks with an axe that has Dreamsword {3x2} range. Causes temporary invincibility when hit by this attack. (90/110/130)
Cards: Big Axe 1, 2, 3
Movement: Warp

Name meaning: "Big" refers to the size of the virus while Reapa/Great/Kaiser refer to the attributes of the virus.

Eyes Group (elec)
Eyes - 150HP (Found in the 1st & 4th area of the space station's wave roads)
GuardEye - 190HP (Found in Uchuukuukan no Denpa 1)
ProtectEye - 230HP (Found in all areas of the Uchuukuukan no Denpa)

Attacks: Voltic Eye - The virus will face you, mark its target with a cursor, & zap it three times with a spark. Pierces invinsible. (20x3/30x3/40x3)
Cards: Voltic Eye 1, 2, 3
Movement: Float

Note: The virus is invincible when its eye is not facing you.

Name meaning: "Eyes" refer to what the virus is while "Guard/Protect" refer to how it is invincible when the eyeball is not exposed.

Majoneel Group
Majoneel - 160HP (Found in the 1st & second area of the space station's wave roads)
Majoneele - 210HP (Found in Uchuukuukan no Denpa 1 & 2)
Majoneelo - 250HP (Found in Uchuukuukan no Denpa 2 & 3)

Attacks:
-Element Magic: Fires flames down two columns at once. Majoneel uses fire magic, Majoneele uses aqua magic, & Majoneelo uses elec magic. Causes temporary invincibility when hit by this attack. (60/80/90)
-Holy Panel: The virus lays a holy panel underneath itself.
-Barrier: The virus grants a barrier to either itself or an allied virus.
Cards: Magic Crystal 1, 2, 3
Movement: Warp

Name meaning: The name of this virus set is a play on the word "mage".

Basarika Group
Basarika - 150HP (Found in the 2nd & 3rd area of th space station's wave roads)
Basariguru - 210HP (Found in Uchuukuukan no Denpa 1 & 2)
Basarigger - 260HP (Found in all areas of the Uchuukuukan no Denpa)

Attacks: Berserk Sword - The virus will constantly warp after you while slashing with one of its arms. Causes temporary invincibility when hit by this attack. (100/110/120)
Cards: Berserk Sword 1, 2, 3
Movement: Warp

Name meaning: The names of this virus set are a play on the word "Berserker".

Hell Black
HellBlack - 90HP (Found in final area of the space station's wave roads as well as the 2nd residential module where &romeda awaits)
KillerBlack - 150HP (Found in Uchuukuukan no Denpa 1)
DevilBlack - 180HP (Found in Uchuukuukan no Denpa 2 & 3)

Attacks:
-Planet Shoot: Fires a planet down the column. Causes temporary invincibility when hit by this attack. Breaks shields. (70/80/160)
-Black Hole: Sucks away HP no matter where you are. Pierces invisible & barriers, but not auras. (up to 100/150/200)
Cards: Black Hole 1, 2, 3
Movement: Warp

Note: Only swords or other sharp weapons can hurt these viruses.

Name meaning: "Black" refers to "black hole". Hell/Killer/Devil refer to its devious appearance.

Jamminga Group (I'm including Jammingas here because while they are FM Seijin and not Denpa Viruses, they have multiple forms in the same way as viruses do. Unlike viruses, Jamminga's Giant forms are not merely doubled in strength and endurance.)

Jamminga - 200HP (All Jamminga battles are initiated through the storyline)
Jamminga 2 - 500HP
Jamminga 3 - 800HP
Jamminga G - 800HP
Jamminga 2G - 900HP
Jamminga 3G - 1000HP

Attacks:
-Jamming Machine Gun: The Jamminga will fire a vulcan down the column. (1x10/3x10/5x10/3x10/7x10/10x10)
-Jamming Punch: The Jamminga will warp in front of you and attack with a punch. Causes temporary invincibility when hit by this attack. Breaks shields. (20/40/80/40/80/120)
Cards: None (though they are featured in the Jamming Machine Gun and Jamming Punch battle cards)
Movement: Warp

Name meaning: The function of these soldiers is to disrupt, or jam electronic waves.