If I have this right.
Ridley gets shot up in Metroid, rebuilt as Meta Ridley for the Prime Trilogy before regrowing his organic body as Proteus Ridley in Samus Returns and completely eschewing cybernetics in Super Metroid, where he dies. Then he's cloned for Other M and that clone's husk ends up on the ship from Metroid Fusion where it gets infected by X.
See this is the absolute problem with this interpretation. Ridley doesn't just get shot up. He blows the fuck up. Entirely. There's nothing left to "rebuild" into Meta Ridley. Meta Ridley has to be some kind of clone.
Him exploding likely isn't meant to be taken that literally. Just a defeated enemy disappearing because having their body stick around as a pile on the floor is too much work. Mother Brain and Kraid also survived "blowing up".
Sakamoto's explanation for Ridley coming back after being defeated is that if enough of him is still alive he can devour biological material to recover his body. The first time he was blown up was when Samus' father blew up Ridley's mothership and dropped it on him. Ridley ate the corpses of Samus' family and the colonists to reform his body.
Ridley's probably the most outright evil Nintendo villain. This scene is so cold-blooded.
Prime is a bit at odds with the main games since it treats the Space Pirates as an organization where Ridley isn't at the top and is instead treated as a bio-weapon, but the logs say:
"The reconstruction of geoform 187, code-named Ridley, was recently completed. After his defeat on Zebes, Command ordered a number of metagenetic improvements for him. Though aggressive, we were able to implement these changes in a
cycle. The metamorphosis was painful, but quite successful in the end. Early tests indicate a drastic increase in strength, mobility, and offensive capability. Cybernetic modules and armour plating have been added as well. We believe our creation, now called Meta Ridley, will become the mainstay of our security force, a job he will certainly relish."
Geoform 187? Ridley is a codename? Command? A job on the security force? This is all so at odds with how the Space Pirates and Ridley operate in the main games. Ridley is their leader, not some low-rank beast they keep around. I love Prime but its lore is such a mess.
Dry Bowser would be cool, but he needs his signature move:
He was basically created to differentiate between Bowser who just breathes fireballs and Bowser who also throws hammers (replacing the hammers with bones). Could borrow it from Simon's axe throwing. Plus they made him immune to fireballs.
Throwing his head would also be a cool move. It could act as a mine/remote bomb.