English Title: Keroro Gunsō: Mero Mero Battle Royale
Japanese Title: ケロロ軍曹 メロメロバトルロイヤル
Publisher: Bandai
Developer: Now Production
Genre: Fighting Action
Released: Sep. 30, 2004
Product Codes: SLPS-25399 / JAN 4543112249500

Sgt. Frog meets Power Stone, pretty much. There's some weird gimmick about the stages being small dioramas to justify the normal human characters being the same size as the tiny alien frog things, but really it's just grab stuff and beat the crap out of each other. Somewhat stiff and not really particularly fun, but it does at least allow 4-player brawls.