A man decided to dress up like an animal and named himself Luke. But his friends hated that name and changed it to Lukario. Then that one person who stayed out of everything changed the spelling to Lucario. The man and his friends never became famous, but the man who stayed out of everything did. And Lucario was born.
Baby Luigi was tired of being treated like a...uh...baby. So he went to Russia and fought a robber wearing ancient armor. Instead of returning the armor, he took it for himself and became Russian Baby Luigi.
Once upon a time, there was a blue who found out where got his hat from. That blue Toad then went to the place where Mario found his hat to get his own red hat with his initials on it. After getting the hat, the Toad went home to play a game called "Cuphead." The game looked really fun and charming. However, the blue Toad just couldn't beat the first level. After finally beating that first level, he thought "Where's a health item?" He was irritated but decided to keep on playing anyway...
Some guy created a Yoshi toy that comes to life when the guy is not looking, kinda like some sort of Toy Story mechanism. Except it was pink, and it wanted to be green, so that it would look like THE Yoshi. So it escaped because it heard of a legend of a Green Fountain, a fountain that turns people green. (So now it's also like Pinocchio)