This pretty much confirm Meowscarada is a bitch and hates any Pokémon who gains its trainer’s attention.
Imagine, in the new anime, if by chance, Ash and Pikachu make some sort of cameo and interact with the main MC of the new story, if she evolve her Sprigatito to that yandere puss, god the bitchy kitty cat will kill that Pikachu for trying to take steal the thunder from her