Meowstic, the Constraint Pokémon. When faced with trouble, Meowstic will raise its ears and create enough Psychic power to demolish a ten-ton truck. Its appearance varies, depending on gender.
– Serena’s Pokédex
While Meowstic isn’t unique in that it has very noticeable gender differences, it is unique in that different gendered Meowstics have different level-up movesets. Male Meowstic learns more status moves while female ones learn more attacking moves. They also have different hidden abilities: male gets Prankster while female gets Competitive.