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Icon-build.png This article is about a group of foot soldiers in Kamen Rider Build and Kamen Rider Ex-Aid. Icon-exaid.png

The Nebula Bugster (ネビュラバグスター, Nebura Bagusutā) were Bugster Virus foot soldiers mutated by the Nebula Gas in Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders.

Character History

The Nebula Bugsters first appeared in the World of Build, where a pack of them ran amok at a factory in Touto. Their presence was reported as a Smash alert to Misora Isurugi, who informed Sento Kiryu. Setting off to face the creatures with Ryuga Banjou, Sento and he respectively transformed into Kamen Riders Build RabbitTank Form and Cross-Z Dragon. Strangely, the duo soon found that their assault had no effect against their adversaries. Sento, however, recognized their appearance from a "dream" he had, actually a recollection of Takumi Katsuragi fighting them in the another world before taking the essence of their natural enemy, Ex-Aid. As such, Sento deduced that he could fight them using the Doctor and Game Fullbottles he derived from Ex-Aid. This theory was soon proved correct as Build's new Ex-Aid Form, identical to the Action Gamer Level 2, proved very much effective against the Nebula Bugsters, soon wiping them out with the Drill Crusher and Gashacon Breaker. Cross-Z, however, was overwhelmed after failing to use the RabbitTank Sparkling Fullbottle. Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders


KREA-Nebula Bugster.png

  • Height: 200 cm[1]
  • Weight: 89 cm[1]
Powers and Abilities
  • Nigh Invulnerability: Build and Cross-Z could not deal any damage to the Nebula Bugsters when they first battled, and they proved to be far more durable and resilient than the Guardians and regular Bugster Virus grunts Build previously battled. As a trade-off, the Nebula Bugsters' weakness to Gashat-based powers and technology makes them even easier to defeat than regular Guardians and Bugster Virus grunts when faced with such.
  • Spreading: The Nebula Bugsters are capable of multiplying their numbers simply by making physical contact with a human being.


  • Tridents: By default, Nebula Bugsters without costumes are armed with trident weapons.


  • Gamer Riders: Having derived from the Bugster Virus, Nebula Bugsters are especially vulnerable to Kamen Riders such as Ex-Aid.
    • Ex-Aid Legend Rider Fullbottles: Even without assuming Ex-Aid form, Build was able to channel the powers of the Doctor and Game Fullbottles into the Drill Crusher and Hawk Gatlinger to damage the Nebula Bugsters.
      • Build's Ex-Aid form: As they're the mutated versions of the original Bugsters, they're also weak against Build's Ex-Aid form, accessed via the Doctor and Game Fullbottles.
    • Other Bugsters: Parado was able to fend off Nebula Bugsters from attacking civilians without transforming into Kamen Rider Para-DX, faring better in a fight against them in civilian form than Build and Cross-Z did in their initial confrontation.

Behind the Scenes


  • The Nebula Bugsters are portrayed by various suit actors.


  • As Cross-Z and Build tries to attack the Nebula Bugsters, it was invulnerable. Because of this, the Nebula Bugsters were possibly stronger than their original incarnations. At cost, Build can use Ex-Aid form to defeat them easily.



Icon-exaid.png Kamen Rider Ex-Aid
Kamen Riders
Emu Hojo - Hiiro Kagami (Game World) - Taiga Hanaya - Kiriya Kujo - Kuroto Dan - Parado - Asuna Karino/Poppy Pipopapo - Masamune Dan - Ride-Players (Nico Saiba - Haima Kagami) - Genm (Bakusou Treasure) - Kagenari Nagumo - Ninja-Player - Black Parado
Game Scope - Gamer Driver - Kimewaza Slot Holder - Rider Gashat - Energy Items - Buggle Driver (II) - Bugster Buckle - Gashat Gear Dual (β - Another) - Rider Gauges - Rider Gashat Case - Energy Item Holder
Gashacon Weapons
Gashacon Breaker - Gashacon Sword - Gashacon Magnum - Gashacon Sparrow - Gashacon Bugvisor (II - G) - Gashacon Key Slasher - Gashacon Parabragun
Other Weapons
Flamber Saber - Ride Weapon - Fuma Sōzantō - Genin Weapon
Robot Gamer - Beat Gamer - Combat Gamer - Chambara Gamer - Sports Gamer - Hunter Gamer - Bike Gamer - Burger Gamer - Fantasy Gamer - Simulation Gamer - Maximum Gamer - Safari Gamer - Tank Gamer - Legacy Gamer - Pac Gamer - Famista Gamer - Xevious Gamer - Galaxian Gamer
Asuna Karino - Haima Kagami - Kyotaro Hinata - Ginko Yumita - Nico Saiba - Satsuki Ogimachi - Mizuki Nishikikoji - Tsukuru Koboshi
Others: Saki Momose - Sakurako Dan - Eight Kirino - Saiko Yaotome
Locations: Seito University Hospital - CR - Ministry of Health - Hanaya Game Illness Clinic - Genm Corp. - Game World - Machina Vision - Next Genome Institute
Generals: Parado - Graphite - Ren Amagasaki - Gamedeus
Movie-exclusive: Michihiko Zaizen - Pac-Man Virus - Hatena Bugster - Soji Kuruse - Kazushige Ryuzaki - Ageha Takeda - Johnny Maxima - Nebula Bugster
Stageshow-exlusive: Futago Bugster
Regular Bugsters: Bugster Virus - Bugster Union - Salty Bugster - Aranbura Bugster - Revol Bugster - Motors Bugster - Collabos Bugsters (Gekitotsu - DoReMiFa - Giri Giri - Jet - Kamen Rider Genm series) - Burgermon Bugster - Gatton Bugster - Vernier Bugster - Kaiden Bugster - Charlie Bugster
Regular Games: Mighty Action X - Taddle Quest - Bang Bang Shooting - Bakusou Bike - Gekitotsu Robots - DoReMiFa Beat - Giri Giri Chambara - Jet Combat - Shakariki Sports - Drago Knight Hunter Z - Dangerous Zombie - Mighty Brothers XX - Perfect Puzzle - Knock Out Fighter - Perfect Knock Out - Ju Ju Burger - Night of Safari - Bang Bang Tank - Taddle Fantasy - Bang Bang Simulations - Taddle Legacy - Maximum Mighty X - Kamen Rider Chronicle - Toki Meki Crisis - Hyper Muteki - Doctor Mighty XX - Mighty Creator VRX - Hurricane Ninja - God Maximum Mighty X - Knock Out Fighter 2 - Zombie Chronicle - Mighty Novel X
Legend Rider Games: Let's Go Ichi Gou! - Adventure Guy Kuuga - Agito of the Sun - Mirror Labyrinth Ryuki - Moshi Moshi Faiz - King of Poker Blade - Taiko Master Hibiki - Insect Wars Kabuto - Time Express Den-O - DokiDoki Makai Castle Kiva - Barcode Warrior Decade - Detective Double - Jungle OOO - Space Galaxy Fourze - Magic The Wizard - Toukenden Gaim - Full Throttle Drive - Kaigan Ghost - Kamen Rider Build - Ganbarizing
Legend Games: Pac Adventure - Famista - Xevious - Taiko no Tatsujin - Galaxian
Other Games: Hatesate Puzzle - Buddhist Priest of Temple - Chou Super Hero Taisen - Chou Shocker Taisen - Bakusou Treasure - WayoseTUNE - Nazo Toki Labyrinth