Mewtwo's Skill

Mewtwo's skill 'Psystrike' The maximum level is 6. It looks strong at first glance, but it might be mediocre if you don't have a party that can harvest a lot of Mago Berries... Since Cresselia and Mewtwo can't be in the same party due to being special Pokémon, maybe activate Psystrike a few times early in the week and then switch to Cresselia... or is Cresselia just stronger from the start? I wonder if there was anyone with the Berry Burst for Mago Berries... I was thinking things like that, but seeing Psystrike activate consecutively because it's a skill and a specialty, I was like, 'Whoa! Mewtwo is amazing! 😆' That's what I was thinking.