Ukiki The Monkey is one of MM54321's characters. He stole Mario's Hat by persuading Mario to get near enough for The Monkey to take the hat, which made Mario angry and having him throw the monkey off the cliff. Much later,he later challenged Mario to a dance competition, but he got killed at the end.
- When the monkey challenged Mario to a dance contest, he was grown up, but it should be noted that he looked exactly like Donkey Kong and didn't have a tail.
- In IGIUL TWO!, the monkey had a brother which Igiul threw off a cliff.
- The Monkey appeared again in The movie Return to Ztarragus's Island in Gold, Gold Mountain,and stole Mario's hat,and then they got into a fight.