Woah, taking that a bit seriously aren'tcha? I never even used the generic species argument, I was comparing him to a Goomba. It's all for fun man.
Well Gooey and Adeleine aren't very important either, they probably wouldn't have made very good playable characters anyway. (I actually liked Adeleine though)
I don't think they chose him for a reason, I think they were lazy and just used him, it's not like Nintendo made two Toads playable for a reason in Mario, they didn't really have any ideas for that fourth player.
I still don't buy him being a main character, there are plenty of reoccurring characters that aren't really major. And as for Meta Knight not appearing, there was one game that even Dedede missed out on. I'd like to see some proof of him being "one of the most wanted in Japan." His importance is debatable, like I said.
Mario power ups? Toad is fast and super strong, he'd probably be the only character besides DK (and probably Ridley) to be able to carry characters around after a grab. Sure he could use a power up or two, but he has a lot more to pull from than that.
I don't think Sakurai goes about it like that, though he does listen to fan demand somewhat, and Ridley is the second most wanted character, so he does have a degree of likelihood. And Star Fox? I don't think it needs three characters but what it needs =/= who should get in. And Falco's only there because Sakurai needed to tack on some clones during Melee and he decided not to drop him for Brawl. Wolf would and should have gotten that spot, and he got his place in Brawl. If the point is that "what Sakurai wants is what happens" then why try to argue a case? What if he doesn't want another Kirby character?
You're cool though, and Waddle Dee is alright, I just like a good debate.
Bit bored.