Mario’s new ally in Paper Mario: Color Splash is Huey. Huey is a talking paint bucket who accompanies Mario through Prism Island, helping him restore the island’s missing color and recover its Big Paint Stars.
Huey is central to the game’s paint-based design. Mario uses his paint hammer to fill in faded areas, solve environmental puzzles, and strengthen battle cards. Huey also provides guidance and comic dialogue as the adventure unfolds, giving Color Splash a recurring companion even though Mario does not have a traditional party of controllable allies.
Several names in this question belong to other Paper Mario games. Tippi is Mario’s partner in Super Paper Mario, Kersti is the companion in Paper Mario: Sticker Star, and Olivia is the major ally in Paper Mario: The Origami King. Huey’s paint-bucket form is therefore one of the clearest visual identifiers of Color Splash.