Everything else we know about the Tricky Pokémon event in Pokémon Go Aside from the Tricky Pokémon research quest, there are a number of bonuses which are only available on Thursday, 1st April in Pokémon Go to celebrate April Fools Day. Team Go Rocket has upped their invasion efforts with their balloons and PokéStop takeovers occurring more frequently. This event also sees the release of Shadow Aipom and you'll definitely be able to catch one, because it will be only Pokémon in the all of the Team Go Rocket Grunt's teams! Pokémon who love playing tricks will appear more frequently during the event.