Pokémon Go players need to catch 3 billion Pokémon to complete the new Global Catch Challenge.
Pokémon fans will be familiar with the leader of Pokémon Ultra Sun and Moon's Team Rainbow Rocket.
Nintendo has released a story trailer for the Ultra versions of Pokémon Sun and Moon.
A new trailer for Pokémon Ultra Sun and Ultra Moon shows off a few of the changes that have been made.
Don't forget to grab your limited-time holiday Pikachu in Pokémon Go.
You'd better hope this Pokémon Go fan isn't at your costume contest tonight.
Meet the final evolved forms of Pokémon Sun and Moon's starter Pokémon.