1.According to the instruction guide included with Super Mario Bros., the koopas turned the inhabitants of the mushroom kingdom into blocks when they invaded, meaning Mario is contributing to the death of thousands in the game.
2.The mushrooms from the Mario Bros. games are based on a real mushroom with psychedelic effects that make it feel as though you are growing in size when consumed.
3.If you let a Chain Chomp tug on its chain 49 times in Super Mario Bros. 3, it will break free.
12.Wario's name is actually based on the Japanese word for "bad," which is "warui," and is a shortened version of "Warui Mario." The same goes for Waluigi, which is an Americanized version of "Waruigi."