*The front license plate on one of the trucks in Moonview Highway reads SMB3 (Super Mario Bros. 3).
*In wiggly portions of tracks such as the wiggling net in Maple Treeway, you can repeatedly do tricks in midair.
*When you use a bullet bill, the amount of time you turn into a bullet bill doesn't always stay the same.
*In the underwater tube in Koopa Cape, there are spinning shells that have electricity coming out of them. This is a possible reference to the Scatter Bombus in Metroid Prime, except they shrink you.
*Even though some obstacles don't hurt you and just bump you instead, they can be cleared with a starman.
*Mario Circuit is the track with more versions of itself than any other stage with 4 tracks (N64 Mario Raceway, Mario Circuit, GCN Mario Circuit and SNES Mairo Circuit 3).
*In Mario Kart Double Dash, the top of DK Mountain had a volcano, but in Mario Kart Wii, the top of DK Mountain (DK Summit) is ice-capped! What's up with that
*In Maple Treeway, the piles of leaves dont do anything theyre fun to drive through.
*A star that is probably STAFY follows Rosalina.
*When Peach is riding a bike instead of a car, she wears a shirt and pants instead of her dress.
*You can shoot shells backwards and you can also shoot banana peels and fake item boxes forward.
*Out of the 4 retro cups, the leaf cup is the only cup named after something thats not an obtainable item in the game.
*Some of the tracks are different than they were in the games they debuted in (aside from the graphics). For example, the pipe shortcut in Peach Beach is gone and cocon.uts no longer appear out of nowhere and hit you when you go into the gra.ss in the jungle portion of DKs jungle Parkway.