The source for this animated GIF is from Taisen Hot Gimmick Forever. More information can be found in this journal entry. Don't forget to add my journal to your watchlist, since I update it frequently with links to great artwork like this.

I took screenshots of each individual frame of animation and stitched it together in GIMP. It doesn't look great when shrunk down to 150x105, but that's the size that I can make this available under the terms of fair use. Luckily, Akiko-chan is one of the first characters you challenge in the game, so it was easy to get to. If you like the image, you should try to hunt down the game. This is the PG rated version, since the full version shows her blowing her top, if you know what I mean.

Thanks go to Jun Tsukasa for creating the lovely artwork used for the game.

Edit: Also check out Akiko Daimon Animated Flex, a modified version of this animation.