Fanboy over someone moar plausible, like Batman.
I'll leave these here. While not terrible, it does look a bit awkward, and if the hypothetical design actually existed, they'd have issues making his movements and attacks not look awkward with those limbs. He also looks a lot less intimidating at that size with those scrawny limbs. In the meantime, I'll see what I can do in photoshop with images I find of other m ridley.
It's not a matter of re-sizing issues, it's a matter of needing to severely down-scale. It's not happening.
Don't see how those images help your argument anyways. After seein' Ridley smack around the Falcon Flyer like a toy, it don't at all look right seein' 'em as tall as Samus.
Although we do have to consider different forms. There has been quite a few different Ridleys like Meta Ridley, Omega Ridley, Neo-Ridley, and uh this thing...
I don't think it's too out of place if the potential one in Smash could be a different Ridley form or normal Ridley in an adolescent post larval stage.
No other character in Smash has had that occur to allow their inclusion. Reason being, any character in question that needs a new, Smash-only appearance, isn't compatible with bein' playable in their natural form. Ridley has to be severely modified t' be playable 'cause he doesn't fit in otherwise. That's exactly why it's not even plausible. No matter what good reasoning behind the ideas of him bein' playable can be conjured, the reasons against immensely outweigh.