Olimar's entire gameplay and concept consists of facing enemies much bigger than you, this concept doesn't even slightly appear on Smash and he's still fine.
He's one of the smallest and lightest characters in the game, and has maybe 5-7 moves in which he personally strikes, otherwise he relies on the strength of his several Pikmin to take down the, again, larger and stronger opponents. The reason he can't be
even smaller than he already is is because the characters of SSBB, from Meta Knight to Ganondorf, are all substantially more mobile and aggressive than anything in the Pikmin universe.
Kirby, who may be the shortest, is normally about the same size as weak enemies and 1/2-1/3 the size of stronger enemies, and absolutely tiny compared to most bosses. The characters of SSB are of the appropriate scale. You may notice that Kirby and Dedede are still roughly the same size relative to each other, compared to their own games.
The most reasonable argument against Ridley is that that scale consistency would be violated, as Ridley is about the size he is in SSE in almost every Metroid game, and when he wasn't that size, it was due to technical limitations. And don't bring up Bowser in Mario 64, he has been given a
canon height, and it's consistent with his current portrayal.
I don't doubt that Ridley will make it in [he will, there is no doubt in my mind of this], but your arguments are not just full of holes, they're also presented in the most obnoxious manner possible.
You can be obnoxious or you can have bad arguments, one or the other. Both together is incredibly annoying.