I volunteer Super Mario World Mario. The current Mario does not accurately represent the game Super Mario World which is Miyamoto's favorite Mario game and therefor my opinion of it being super important above all others is fact.
Mario used his cape to fly in Super Mario World, he never swung it at enemies to spin them around. This is a total blasphemous misrepresentation of the cape and the game Super Mario World in its entirety. Super Mario World Mario would use his cape as an up special, letting him fly completely accurate to the original game, brokenness and all. He can summon Koopa shells of various colours as his down special before jumping on them and kicking them forward, even though shells are an item.
There are so many things from Super Mario World that he can randomly pull out of his arse to use in a fight, why not let him ride the Koopa Clown Car for his final smash, dropping giant balls and Mecha Koopas. He can even pull out the flashing block for his side special. He totally looks distinct from Smash Mario too, Super Mario World Mario has realistic overalls like in Brawl, so there's absolutely no similarities whatsoever and it's physically impossible to confuse the two.
Don't even get me started on Super Mario Bros. Mario. Smash Mario's fireballs are nothing at all like the real fireballs, that were small, quick, and could be fired twice at a time until they disappeared off-screen, he should have to eat a Fire Flower and turn into Fire Mario before being able to do so as well. And Mario
never hurt enemies by jumping
under them, let alone did he ever randomly spawn coins without a block. Super Jump Punch should be Super Head Stomp.
Smash Mario doesn't shrink when he gets hit either, he should have the unique mechanic of having to eat Super Mushrooms to regrow in size after taking damage. Plus he's
Super visually distinct too, you can't tell me that these two are the same: