It’ll hit the base game eventually
Capcom and Nintendo are no strangers to partnership-building promotions, and this one is once again hyping up Smash Ultimate and a Monster Hunter entry. Monster Hunter Stories 2 is just around the corner, and although the bonus is fairly small, you do get an unlock in the form of a Smash spirit.
As confirmed by the official Smash Twitter account run by Nintendo, the small winged Razewing Rathalos is unlocked via a Stories 2 save file. All you need to do is have a file in the game that’s out from July 9 on, and you’re good to go. The one in the promotional image shows 3,144 power.
In case you’re wondering, this isn’t exactly new for Smash Ultimate. Several other games have done tie-in spirits, and those have/will eventually hit the core game in time. For instance, Arthur was given out as a “special present” for Ghosts ‘n Goblins Resurrection.
— 大乱闘スマッシュブラザーズ【スマブラ公式】 (@SmashBrosJP) June 30, 2021