Basically a giant version of this
A Massive Steel Cage surrounding a wrestling ring with with one giant chamber in each corner. The cage is surrouned by a massive arena of space rednecks hootin and hollarin at which kaiju they want to win.
-Multiple Monsters- if for any reason there is an unmatched kaiju within the desumacchi it is automatically placed in the elimination chamber along any two other combatants. If this is the case the first time a chamber opens the third monster enters the bout automatically with a power number of 45
(note I'd be willing to scrap/modify that rule)
- Chambers- There are 4 chambers inside the steel cage. Each chamber holds within it a deadly obstacle for the two kaiju fighting inside the ring. Every 2 rounds a chamber opens and if there is not an official Dessumachi combatant inside roll a d100
1-29 The chamber is empty and there is no effect
30-49 A Robot Luchador exits his cage and jumps around the arena doing pretty much nothing. Each kaiju must make a focus roll to either attack it or their opponent. The luchador has a defensive PN of 15 and takes one hit to destroy
50-69 a cloud of gas is released weakening each combatants Defensive PN by 10
70-89 OH MY GAWD A SPEAR!!! - A giant robot wrestler flies out of his chamber and kamikaze's one of the combatants dealing one wound
90-100 A Giant robot wrestler enters combat with power number of 30 he takes one hit to be destroyed
-Cheer for the Underdog- At the beginning of the match if there is a difference in power number larger than 25 between the combatants the crowd cheers heavily for the underdog raising its power number by 15.
-Cage - Being a cage this arena drastically effects flying kaiju eliminating any defensive re rolls they may have.