It's other moves are reflect and light screen. If I put miracle eye on it I will also put on psychic too. But if not it will have thunder wave and energy ball. I don't know which one to choose. Please help!
EDIT: the meowstic is male and it has prankster
No, you definitely should not teach Miracle Eye to your Meowstic. Each Pokémon is only able to learn four moves, and if you're planning on using Meowstic against a Dark-type, you should consider a different strategy. An attack such as Energy Ball would be a much better use of this moveslot. Hope this helps!