Keroro Gunsou: MeroMero Battle Royale Z

MeroMero Battle Royale Z is the sequel to the first game. It plays
virtually identically, but adds three new playable characters for a total of
15, and also adds three new game modes: a Challenge Mode that gives 10
missions to clear for each character, a Survival mode where the player must
complete as many missions as possible without running out of life, and a 2D
Fighter mode that limits movement to a 2D plane, mimicking games like Super
Smash Bros. The story mode, however, has been removed.