Kaiju Big Battel is a live event series that revolves around tournament-style performances, which are a tongue-in-cheek hybrid of American pro-wrestling, Japanese-monster-movie mayhem, and lowbrow pop-culture.  Descriptions include:

“A celebration of weird Japanese pop culture-specifically kaiju (those big monsters like in Godzilla and Ultraman), bad Japanese-to-English translations and wrasslin’.”

“This phantasmagoric phenomenon is no backyard-bodyslam ballyhoo: more spoof than sport, with a cast more comic book incarnate than Spandexed superstars, it’s a self-contained, self-parodying universe.”

Essentially it’s a bunch of people that dress up in crappy foam rubber costumes and fight each other.  Surprisingly, they have their own website.