It was terrible. Input lag made dodging enemies impossible, and the PSP lacked the second analog stick (you had to map camera/block to the face buttons). It was a novelty, not a viable way to play.
There are dozens of weapons, but here are a few common ones: castle crashers psp
The desire for this port speaks to the timeless nature of the game. Castle Crashers is a title that demands to be played socially, on a couch or a bus ride, with friends. While we eventually got a portable version on the Nintendo Switch years later, a specific generation of gamers still looks back at the PSP era with a twinge of regret. It was terrible
The PSP has a massive "homebrew" community that creates unofficial versions of popular games. Fan-made clones: There are dozens of weapons, but here are