If you are in the room at the end, then speed off to the back right and fall out of bounds in a star or mushroom, the lap will be counted but you will respawn right before the finish line, allowing you to drive across the finish line and complete another lap. I need to do more testing on this, but I encountered it while playing with my brother via local multiplayer. I believe this has to do with where the finish line hit box is, and adjusting it should fix the issue.
This was encountered on real N3DS XLs and on the latest version (to my knowledge, not sure about one of the systems).
If you are in the room at the end, then speed off to the back right and fall out of bounds in a star or mushroom, the lap will be counted but you will respawn right before the finish line, allowing you to drive across the finish line and complete another lap. I need to do more testing on this, but I encountered it while playing with my brother via local multiplayer. I believe this has to do with where the finish line hit box is, and adjusting it should fix the issue.
This was encountered on real N3DS XLs and on the latest version (to my knowledge, not sure about one of the systems).