Have you noticed that in Mario Kart 64, Peach's castle looks different then in SM64? Okay, not the castle itself, but what surrounds the castle like the trees, birds, butterflies, moat, path, and waterfall. The trees, birds, butterflies, and waterfall aren't in MK64, you can't see through the moat, and the path that leads to the castle from Royal Raceway isn't in SM64. I have a theory, first the trees, birds, and butterflies. While Mario and Peach were eating cake, Wario came to the castle (after eating many bean beritos) and "let one out", causing the trees, birds, and butterflies to be blown away. For the moat, that's easy, Bowser had to go to the bathroom bad and, well, you could guess the rest. The waterfall, well, after SM64, all the coureses were blocked off including the metal cap swith area. If you played SM64, you know that when Mario exit the metal cap switch area, Mario falls out of the waterfall, and when the metal cap area was blocked off, so was the waterfall. And finally, the path. The pipe that leads to the castle was cloged, so they made the path. Hope that explains it. Oh, and if anyone replies(I hope they do), please don't say anything about SM64 coming before MK64 or about MK64 being a canon game. Thank You.