Rilla Roo

Rilla Roo is a character that was introduced in Crash Bash. He is cross between a gorilla and a kangaroo. He was most likely created by Dingodile, who after Crash Team Racing decided to start a pet store, where he created his own mutants, among them was the 'Kanga-rilla'. Crash Bash was his only appearance in the series so far. However, he was originally going to be playable in Crash Nitro Kart.

Crash Bash
Rilla Roo is one of the playable characters in the game. He helps Uka Uka's team against Aku Aku's team. He is the same type of player as Dingodile. In pogo stick levels, he uses a power drill as a pogo stick, he has weak throwing power in Crate Crush levels.

Crash Nitro Kart
Rilla Roo was allegedly going to be a playable character in the game, but got cut along with Doctor Nitrus Brio and The Komodo Brothers.

Trivia

 * He was called Kanga Rilla while the game was in production. The same named used for a mutant Dingodile created after Crash Team Racing.
 * He is the evil counterpart of Dingodile (who is a dingo crossed with a crocodile); both have the same abilities, weaknesses, advantages and disadvantages.
 * He is one of the two characters that has been mutated by a kangaroo. The other is Ripper Roo.
 * In the Crash Bash manual, he is explained as having "the disposition of a train wreck", and his photo is a black silhouette as "he doesn't like having his photo taken".