Mario

mario is the main playable character in super DUPER mario bros. and is the star of Nintendo inc. he has been in numerous games with his brother, Luigi and his main motive is to save peach and defeat bowser. in this game, he does have 2 evil counterprts bowser made; oiram, and shadow mario.

backstory
mario grew up as a plumber/carpenter alongside Luigi in broookland when they fell into a green pipe. when they came out the other end, they saw strange mushroom creatures. they said mario was the chosen one, so he got the power of the fire flower. he defeated bowser and became a hero. the story is too long to tell fully.

in this game, mario wakes up to hear peech screaming "help! mario!". just like normal, he goes on an adventure. but before this happens, he met cheo and cheo let him on his secret.

mario is in no way excluded from other games, though. even in sonic games he appears.