Modern Protean only changes the Pokémon's type on the first move after switching in. By using Play Rough immediately upon entry, Meowscarada becomes a pure Fairy-type, drastically altering its defensive profile. This first-turn type shift provides immediate resistances to Fighting, Bug, and Dark, and critically, an immunity to Dragon-type attacks, making Meowscarada an unpredictable threat on entry. This strategic type change can allow Meowscarada to absorb hits or set up against foes that would typically threaten its original Grass/Dark typing, turning a potential liability into a tactical advantage.