Here are two more ideas for Show Town Base 2 DP994.
First of all here's another characters in bass segment Pepper Clark and Squirrely have a burping contest the two each have a can of soda which they gulp down after a few seconds Squirrely's stomach gurgles and let's out a big belch much to Pepper's amazement she then waits for the pressure innher stomach to build up but nothing happens Squirrely says maybe you didn't drink more soda then me then Pepper's stomach begins gurgling she's about to belch when suddenly Zoe Trent comes into the room and asks what's going on? Pepper tries holding her breath to prevent her from burping but then she belches in Zoe's face making her beret fly off and messing up her hair and fur Zoe looks unamused and says wow sarcastically.
Second idea is based on which character fights which villain you said that Omni Man would fight Bowser and here's some more ideas.
Ash Pickachu and Meowth fight James and Jessie ( Obviously and also during this Meowth rants at them why he wanted to leave and live with a new girlfriend )
Peacemaker fights The T-1000 ( Which is kind of ironic since Robert Patrick also plays Peacemaker's dad in the Peacemaker show )
The Bounty Hunters fight Cad Bane
The Phantom Thieves fight Venom and Carnage
The Critters fight Skarlet
The Quirky Quintet fight Heddily
Let me know what other combinations you can think of.