Expert Difficulty (すごく強い) is the fourth CPU rank in Wii Party and Wii Party U.
Overview[]
Expert Difficulty is unlocked after winning a Party Game in Advanced Difficulty. They tend to perform quite good in Minigames. The difficulty is harder than the previous three difficulties, Beginner Difficulty, Standard Difficulty, and Advanced Difficulty, but easier than the highest difficulty level, Master Difficulty.
List[]
Wii Party[]
Top row: David, Eduardo, Eva, Gabi, Greg, Hayley, Jake, Keiko, Kentaro, and Martin.
Bottom row: Midori, Rachel, Rainer, Rin, Sandra, Shinnosuke, Shinta, Silke, Susana, and Theo.

Wii Party U[]
Top row: Akira, André, Claudia, Dunbar, Eduardo, Giulia, Hyun-woo, Jesús, Leonel, Léonie, and Marie.
Bottom row: Marit, Matt, Mizuho, Mónica, Paula, Pavel, Skip, Sophia, Steven, Xixi, and Zi-Kai.

Trivia[]
- In Wii Party U, there are 12 males and 10 females in Expert Difficulty.
- Marie and Mónica are the only Miis in this difficulty who don't hold any default rankings.
- Outside of teammates, no Champion is in Expert Difficulty.
- Both Eduardos are in Expert Difficulty.
- No Mii whose favorite color is Orange is in this Difficulty.