Worms World Party on the GBA. Note that this is the GBA version of the game. I love the Worms series, but this one is bad.

It is easily the most poorly coded game I've ever played. The guns don't shoot the way they do in the actual games. There's two animations - walking and dying. Nothing else. And the game crashes. It crashes. You know it crashes because the 8-bit Nintendo music goes to a beeeeeep and the screen goes black with a bunch of random green rectangles appear on screen.

This is an example of a game that should be awesome but was just so poorly programmed that it's bad. Play the PC version instead.