Inspired by the Hercule Satan vs Dan Hibiki Death Battle, one of the wackier ones.

Trixie signs up for a World Martial Arts tournament and finds herself pitted against another Kathleen Barr-voiced character...that's conjoined to a pessimistic dragon. This starts off as a standard martial arts match, but the announcer lets Trixie use her stage magic to make it more exciting. Then Zak, with his constant pessimism, escalates the friendly fight to a life-or-death one.

There's a Human tag because the title character of Caillou also dies as collateral. And speaking of spoilers, I suggest any Zak and Wheezie fans around leave the room ASAP.