The longer Sakurai avoids showing stage hazard Ridley, the more I wonder if that's all he is. I just can't imagine Sakurai hyping a stage hazard the way he has. Of course that could be exactly what he's doing but a part of me wonders if the team on Smash is aware of the Ridley debate and are toying with everyone.
As for Ridley's tail, it lagging behind him like Olimar's trail of 6 Pikmin could work but with no actual hit box on them. Even then it doesn't have to be that long, all every limb in the game does is stretch and expand to hideous levels when characters attack anyway.
Village, I see people say things like often, things to the effect of "it's not what the creators intended." When it comes to Smash bros that is biggest bull crap ever. Sakurai takes so many liberties I doubt anyone is sitting over him like "no you can't do that I'm sorry." The closest to that that we know of is actually the Pokemon characters and the Pokemon company lets Sakurai go nuts with their sizes. Beyond that though, do you think Sakamoto likes that instead of Samus's suit disappearing when she transforms, she gets to chuck the broken pieces at enemies? I bet he could care less, maybe even thinks it's cool.
What about Peach and her exploding butt? Without knowing anything about Peach's creation I can say for a fact Miyamoto never intended for that. Olimar is giant now and uses Pikmin like a club? He throws them sure, but like a bludgeoning instrument? Maybe he did and I missed that part. Not to mention the many characters who went from literally nothing to full on Smash move set. I get Fox's reflector inspiration, but fox fire? How about Ganondorf? That has to be the biggest F U to Sakurai's character creation process.
The fact is Ridley was small before, he can be small again and was depicted as being smaller in Melee. No one cared and I'm certain no one at Nintendo gave it a second thought. He doesn't have to be Metroid small but he doesn't have to big as Zero Mission Ridley. Ridley can't even stay consistent in his own games. Just look through every Ridley appearance on YouTube, there is no rhyme or reason to his changing size aside from most likely gameplay necessity.
Sakurai acknowledges size with Kirby and Olimar, as the two shortest characters in the game. He even labels Olimar as the shortest yet he is still taller than Kirby. The characters are fighting on a stack of children's playing blocks for crying out loud, where is your size argument there?
When I consider what Smash is(maybe was), a collection of toys and dolls fighting on books and pencil holders, pretending these props are actual stage pieces, any type of canonical series logic goes out the window.
I don't think Ridley is likely, though I do find Sakurai's constant teasing of him a little suspect and he certainly likes the character enough to have him featured in each Smash bros so far. But I have to step in when I read a truthful "too big, the creators wouldn't like it, look at all his games but that one." What I really love is when Ridley haters go on to preach for King K Rool. Compared to Donkey Kong, K Rool is a giant on the SNES and only got bigger, especially on the N64. I wonder were these same people pissed when Honey Queen was shrunken down for Mario Kart 7? But it's a spin off they'd say right? Well so is Smash.