In a neat bit of cross-promotion, owners of Pokémon: Let's Go, Pikachu! and Let's Go, Eevee! can get easier access to a pair of Spirits in Super Smash Bros. Ultimate. Save files for either title will allow Smash Bros. players to utilize a support Spirit based on their respective game. Fortunately, those who don't own either of those games can unlock the Spirits through other means.The Spirits are named "Partner Pikachu" and "Partner Eevee" to be more specific to Let's Go, which adorably allows for trainers to have their partner Pokémon travel alongside them on the field, resting on their head or shoulder; players can dress up their partner Pokémon or have them learn special moves.This trainer-Pokémon relationship is translated into the Spirit abilities for Super Smash Bros. Ultimate—Partner Pikachu gives fighters increased attack and mobility, while Partner Eevee allows for an increase in general stats. And like in their original games, they are both cute as hell.Luckily, players can also unlock these Spirits through challenges rather than buying another $60 game. Conversely back in the day for Super Smash Bros. Melee, there were cases where save data was an exclusive method for winning certain trophies—for example, a save file of Pikmin was required for retrieving the Captain Olimar trophy, Olimar not being a playable character until Brawl.This revelation comes shortly before Super Smash Bros. Ultimate finally releases on Nintendo Switch—Nintendo has since released several videos leading up to the launch, including an unboxing and some gameplay videos. If you're one of the few people who hasn't participated in the game's massive pre-sales, you can pre-order the game on Amazon here.