Prinny 2: Dawn of Operation Panties, Dood! (PSP)

Prinny 2 is a side scrolling hack and slash action game. Players will control demonic penguins, Prinnies, who are known as the "weakest monsters in the Netherworld." Players can run, jump, slash, execute special skills, and ride tanks or jets to battle enemies. The Prinnies' mission is to find Demon Lord Etna's stolen panties! If they fail... Etna will turn THEM into panties! As an extra bonus, a whole new main character and story become available after you complete the main game.