Gentlemen… their time is now.

-20+ incarnations? How about the CANON ones? And in most of them, he was still gigantic, Yes, even in other M
-And like I said, those charachters at least don't have about 80% of their moveset based on it
-Bowser is at least a threat to Mario because he's a big, heavy character, while Mario's average to the max. Samus is already big and heavy, and, as I said ridley is omstly threatening because of his flight, ENORMOUS size and pretty good speed (OK I didn't mention that before but Rifley's pretty fast for his size). See, they could fit a new form of Ridley, between his newborn and adolescent form (spoilering one of the major subplots in other M, huh), that fought "ferally" and could still be one of the biggest characters (even the biggest), and I don't know, turned into Ridley for his final Smash, then hatched from his egg and evolved rapidly.
-Size is already a joke, even if true
-Like I said, his size is really versatile depending on the game, because Super Mario is a "non-serious" franchise
-It was just in case someone wanted to bring the "but Olimar is too small" thing
-OK, I'll trust you on that. But, as you said, "he never had a set size at that point". But now he does: a gigantic size. Therefore…