This article is about a/an monster in Kamen Rider Ex-Aid.

This Collabos Bugster (コラボスバグスター Korabosu Bagusutā) was born from data of the samurai-themed game, Giri Giri Chambara. It can copy and manipulate the Rider Gashat installed on his head.

Character History

Clash with the Riders

It is born from the infection of Yoshio Okada alongside the Jet Collabos Bugster after the Ouroboros Bugster Union is defeated. It duels Ex-Aid Robot Action Gamer Level 3, Ex-Ai barely dodging its swift sword swings several times, but Genm distracts the Riders, letting it escape. It later attacks Yoshio's daughter Shiori, Ex-Aid and Lazer intercepting it. It tries to pull out its sword as they rush it, but Lazer Bike Gamer Level 2 is too fast and Ex-Aid slices its sword in half with the Gashacon Breaker Blade Mode. Ex-Aid then defeats it with a Bakusou Critical Finish using the Breaker, and Ex-Aid grabs the Giri Giri Chambara Gashat, giving it to Lazer to use. The Reason for Some Lies!


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Bugster (Bacteria)

Bugster Virus bacterium.

The Bugsters originate as the microscopic Bugster Virus (バグスターウイルス Bagusutā Uirusu), a result of humans being contaminated by the Bugster, thus developing the condition known as the Game Disease (ゲーム病 Gēmu-byō).

Ex-Aid EP 7 Giant Virus

The ouroboros-like Bugster Union that became the Collabos Bugsters (Giri Giri Chambara and Jet Combat).

The Bugster Union (バグスターユニオン Bagusutā Yunion) is the monster form of a Bugster-infected patient when the virus first flares up. When a Bugster-infected patient experiences enough stress, the Bugster Viruses inside multiply rapidly and overtake the patient's body, forming a giant orange virus form around it; the Union's shape seems largely irrelevant to the Bugster's appearance. Bugster Unions can only be defeated by a Kamen Rider in Level 1; the reason why is unexplained, though it may be because other Levels are too strong and may injure the patient inside the Union.

Jet Collabos Primebody

Collabos Bugster Prime Body

The blank form Collabos Bugsters have when not infused with a Rider Gashat. This Bugster's Prime Body form was never seen onscreen.

KREA-Collabos Bugster Girigiri

Collabos Bugster (Giri Giri Chambara)

The Giri Giri Chambara Gashat gives this Bugster expert skills with a samurai sword, noted by Emu as being too fast to land a hit on.

Appearances: Ex-Aid Episode 7

Powers and Abilities


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Behind the Scenes


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  • A repainted suit (except of the silver parts) of this Collabos Bugster with a different headpiece will be used as the Bugster form of Ageha Takeda (Giril Bugster).