First, officers had to figure out which Spider-Man impostor was which, because they found four of them dressed as the superhero about 12:30 p.m., police said.
"They stopped one; it wasn't him," Lt. Beverly Lewis told the Los Angeles Times. "They stopped the second, and it was the suspect."
The victim told police he was hit in the face and arms but did not want to press charges against the suspect, Christopher Loomis, 39. But Loomis was booked on outstanding misdemeanor warrants and held on $5,500 bond.
Lewis said the suspect and victim apparently knew each other.
People dressed as all manner of movie characters and celebrities -- including Elvis, Superman and SpongeBob SquarePants -- work the strip for tips from tourists, the Times said.
Sometimes, however, the frivolity gets nasty when the costumed characters get aggressive.
A few years ago, the police had a "super-hero" summit to try to reduce tensions.