oh wait there's more>The Real Super Mario Bros. 2
Question: Which is the real follow-up to Mario's first quest to save Peach from Bowser? The one where Mario dreamed that he, Luigi, Peach, and Toad all saved another world from an even worse tyrant? Or the one that saw them just going through new levels to do the same thing all over again?
Reason: They both happened at the same time, with Mario flying solo in the first game. While Mario teamed up with dream constructs of Luigi, Peach, and Toad to pwn Wart, the REAL Luigi was saving Peach and the Toad Retainers from Bowser BECAUSE Mario was sleeping on the job, and Luigi figured since Mario pulled it off the first time, so could he.
Basis: Super Mario Bros. 2 (Doki Doki Panic) was All Just a Dream Mario had, while in Super Mario Bros. 2 (The Lost Levels) instead of a 2-Player Game like the original you choose between either Mario (for those who know his style best) or Luigi (who gets his first unique style in this game) as the hero.>Bowser is Bowser Junior's father... and mother.
If Bowsette is canon, it would not only explain Junior's existence, but also the fact that he looks identical to Bowser. Not just his offspring, he's literally his dad's clone.