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Bundodo (ブンドド) is the Quirk used by Mario Kugutsu.

Description
The Quirk's proper function isn't entirely known, due to it only being shown under the effects of Trigger.

Mario's Quirk seemingly grows him to gigantic proportions, similar to Gigantification, while also turning his skin black (most likely due to trigger) and growing an extra set of arms.

Trivia

 * This Quirk is similar to Quad Arms, Extra Arms, and Body Morph.