|Aliases / Nicknames||Duncan, Pirate Boy|
|Living Town||Toad Town|
|Main Weapon(s)||Pirate Hook|
|—Duncan Koopa refusing to live with Bowser|
Duncan Koopa is a koopaling who lost his right hand and right foot. He betrayed Bowser due to the fact Bowser burnt his right hand and foot. He lives with Peach and the Mario Bros. accepted him to live with them.
Super Mario Bros. 3
He was an unlockable character after you defeat Bowser.
- Bowser likes Duncan, but Duncan betrayed him.