Weevil Underwood A.K.A. Insector Haga in the Japanese version of the anime and manga is a recurring rival in the series. He uses an insect type deck. Weevil was once Region Champion of Japan after he defeated Rex Raptor but did poorly at the Duelist Kingdom and Battle City tournaments. Weevil enjoys cheating and using every advantage he can get when dueling.
In the English dub version of the anime by 4Kids Entertainment Weevil was voiced by Jimmy Zoppi.
In the lesser known English dub by Odex Ltd Weevil was voiced by Brian Zimmerman.