Kōichi Yamadera (JP) is a Japanese voice actor who is affiliated with Across Entertainment.

He is known for his roles as Spike Spiegel from Cowboy Bebop, Beerus from Dragon Ball series, and Donald Duck.

For Nintendo, he voiced the color commentator in the Japanese dub of Mario Kart Arcade GP 2 and some Pokemon; Mew for every Smash Bros game starting with Super Smash Bros. Brawl.


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