Websites like GameBrew list various fan-made beat-'em-ups that work on the PSP, though they are not official Behemoth titles.
There is no official Castle Crashers because the game was never released for the PlayStation Portable (PSP) castle crashers psp iso link
A physical and digital Remastered edition is available. Steam Deck: You can play the Steam version of the game. castle crashers psp iso link
: Equip the Cardinal pet to find secret items, such as the Boomerang in the Thieves' Forest or the Pointy Sword in the Industrial Castle . 4. Caution: The Level 256 Glitch castle crashers psp iso link