From the Super Mario Wiki
- Bowser Castle 4 (pictured) is the only Mario Kart: Super Circuit Bowser Castle course that has yet to become a retro course in a later Mario Kart game.
- In Bowser Jr.'s Robot Reactor in Super Mario Galaxy, if the player goes to the top of Megaleg and uses the first person view to look at the starting planet, the player will see that it looks like its grassy early appearance, instead of being metallic. This can also be seen after Megaleg is defeated.
- Super Mario Odyssey is the first Super Mario game to receive an E10+ rating by the ESRB.
- In the fastest possible routes to complete both Super Mario World and New Super Mario Bros. Wii, Iggy is the only Koopaling that must be fought.