Mario Kart World brought back one of Mario Kart 64's lesser-utilized tracks and gave it an upgrade to make it better than ever.

Once you've mastered Mario Kart World's multitude of cup circuits, you may want a new challenge. Mirror mode literally flips maps to change the experience.

Spotted by IGN, an account on X called Ninjinaut showcased the Mirror Mode Easter egg in Free Roam for Mario Kart World. The video sees Baby Rosalina jumping into the window, which is a direct callback to Super Mario 64's mechanic for accessing new worlds.