Toad

Toads are NPCs that can be found throughout Princess Peach's Castle. Some give helpful tips to complete courses, and some give power stars when talked to. However, if people can get all stars in the hidden Toad Town course, they can unlock Toad as a playable character.

Quin
Found in the Castle Basement, Quin is a Toad that can have varying colors. When talked to, they will speak gibberish, and can appear 3 more times. Upon talking to them the 4th time, they can alter certain parts of the game.

Dud
Dud is a black Toad that can appear and can cause major anomalous effects.