To unlock Rosalina, you have to complete the Star Cup in Grand Prix mode. The Star Cup is available from the start of the game, so you can start there immediately if you so choose.

Outside its massive open-world with interconnected courses that pushes the series to new heights, Mario Kart World shocked fans with its weird and wonderful roster of characters. From iconic returning characters to random obscure enemies that don't even have arms to steer,

You can obtain Mario Kart World’s unlockables through various methods, so here's how to get new stickers, karts, characters, and costumes.