Grimlock has been in entered in MTV Geek's Battle Arena E3 Showdown. He will be going up against Mario in the first round. Should be an easy win, right? Show your Fall of Cybertron power and let's win it for Grimlock in the battle for your entertainment. MTVs Battle Arena E3 Throwdown is all-out, no holds barred, slug fest of the best trailers from the year's E3! 32 characters from the hottest, freshest franchises will be judged by you, the fans, and there can only be one winner. Vote now at www.mtv.com.

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