Resolved several minor graphical glitches that occurred on specific tracks.

Only a few lines of code were modified, with no changes to graphics, sound, game balance, or character stats.

Nintendo has confirmed that the Booster Course Pass ended with Wave 6 (version 3.0.0). Future updates (like 3.0.1, 3.0.2, 3.0.3) are strictly maintenance patches. No new content is expected. A Mario Kart 9 (or Mario Kart X ) is rumored for the next-generation Switch, but not confirmed.

The update primarily fixed a security flaw in the game's netcode related to a buffer overflow.

This update is a "behind-the-scenes" polish rather than a feature drop. While it may seem underwhelming to casual players, it is essential for the long-term health of the game's online community.