Xiaolin Showdown - Boxed - PS2

Xiaolin Showdown is a game based on the Warner animated series of the same name. It's a fighting game in which you play as the series' four main characters (Kimiko, Omi, Raimundo, and Clay). Even if you play alone (the game supports 4 simultaneous players in Story mode), the other 3 are present and controlled by the computer. You can also unlock 2 additional characters: Jack Spicer and Chase Young.
Players must defeat waves of enemy robots to collect Shen Gong Wu artefacts, which boost their power, and defeat a series of enemies until they're able to face Mala Mala Jong and put an end to the schemes of the evil boy genius Jack Spicer. Each Shen Gong Wu grants a new ability, such as grabbing nearby people or slamming the ground to deal area damage. Additional Shen Gong Wu can be bought with coins collected during the game.
The gameplay is inspired by party fighting games like Power Stone and Super Smash Bros. You can chain combos with button combinations, jump, and perform flying kicks.
Between game stages there are showdowns, where the characters have to wager a Shen Gong Wu. Whoever wins the challenge chooses a Shen Gong Wu from the player who lost. You can also play just the showdowns instead of the full Story mode.