[Full Fat] The Grim Adventures of Billy & Mandy

Based on a Cartoon Network series with the same exact name.

Game Boy Advance (2006, published by Midway)
1 player



controls:
B - punch
A - kick
R - jump
R, R - double jump
R/R, R, A/B - jump attack
R, Down - bounce high jump
L - Mojo attack (requires the Mojo meter, underneath the health bar to be full, which happens as you defeat enemies)

There's a tutorial if you need a refresher. Though there are 3 characters, you only start with Billy, as you have to complete his story and collect 5 Mojo balls to unlock Mandy, where you then have to beat her story and collect 15 Mojo balls to unlock Grim. The game tells you this as you try to choose characters. Sometimes you'll pick up weapons, so both attack buttons will fire a gun, for example. It's a single plane game, with some platforming elements.