Squirrel Girl is a mutant the with power to control squirrels who fought crime for years alongside her squirrel pal sidekick, Monkey Joe, who sadly met his demise at the hands of Doctor Doom. Squirrel Girl did get the best of Doc eventually, though, by overwhelming him with an army of - you guessed it - squirrels. The trade paperback of The Great Lake Avengers miniseries contained a dedication to the memory of Monkey Joe: "Monkey Joe 1992-2005. He loved nuts. He will be missed." Hey, at least he didn't wind up as roadkill.