Don't remember the last time Ganon did a warlock punch in a Zelda game, or Luigi the green missile, or Captain Falcon basically any of the moves in any of his own games, or Fox any of the moves he has. Your argument is flawed, as there are many characters that do not play how they're supposed to when looking at their own games. Ike in Brawl was a slow and heavy character, in PoR he is one of the fastest units in his game IIRC. Ridley can still spit fire, and do a tail sweep and jabs just fine if he's a bit scalled down. He can also have a run and grab attack where he drags a person on the ground no problem, hell this could actually be a bit like Ganon's side b but with a few differences given how close Ridley grabs somebody. If Sakurai is apparently so creative then he should be able to create a way to make him plausible. Ridley's long arm reach could just be done by him supporting himself on his tail to "jump" and grab somebody or just use his tail to begin with. Ridley can be done, Sakurai just doesn't want to.