I have an idea for a viable Mr. Mime moveset:
Name: Mr. Mime
Nature: Modest
EVs: 252 SpAtk, 252 Speed, 4 SpDef
Item: Weakness Policy
Ability: Filter
Moves:
-Teeter Dance
-Calm Mind
-Psychic
-Dazzling Gleam
The purpose of Mr. Mime is to confuse opponents with Teeter Dance, set up with Calm Mind...