Rilla Roo

Rilla Roo is a mutant hybrid between a gorilla and kangaroo, similar to how Dingodile is a crocodile and a dingo. His first (and only) appearance in a Crash Bandicoot game was in Crash Bash.

Crash Bash
Rilla Roo's first and only appearance was in Crash Bash. Uka Uka summoned him to fight alongside Dr. Neo Cortex, Dr. Nitrus Brio, and Koala Kong on Team Evil. Sources believe Rilla Roo's creator may be either N. Brio, N. Gin, Dingodile, or even N. Oxide. Many believe it is Oxide because after the epilogue of CTR, he left Earth bitter and he possibly sent Roo to destroy the good side and win the crystals in his effort to take over the planet (Earth).

Personality
Note: The following is taken from the Crash Bash manual.

"Rilla Roo has the disposition of a train wreck. Though he prefers to take his time around the arena, his huge whipping tail delivers a nasty blow. Rilla Roo is a first stringer and considers himself a closer - and he doesn't like to have his photo taken. Watch out for this guy - he's not one to monkey around!"

Physical appearance
Rilla Roo is, as mentioned earlier, a gorilla with a kangaroo's tail and feet. He wears red and white striped pants with a belt. He has no visible fingers, due to the low detail in the Crash Bash models (except in the intro of that game).

Trivia

 * He was originally considered a character for Crash Nitro Kart.
 * He may have been one of the many animal subjects that Dingodile created in the CTR epilogue.
 * In the game's manual, the photo of him in a form of his shadow, might be the fact that he debuted in Crash Bash (As it was also mentioned that he doesn't like to have his picture taken).
 * He may be considered for future games
 * Because of their similiar last names, many fans believe that Rilla Roo and Ripper Roo are related. This is unlikely, however, as the surname "Roo" simply refers to one of the animals the creature was made out of. Also, it appears that Rilla Roo is more of a Gorilla than a kangaroo, unlike Ripper Roo who is a complete kangaroo.
 * Rilla Roo used to be called Kanga Rilla.