My first Metroid game was Super Metroid. Then came Fusion. Then Prime. So understand that it is not out of nostalgia for my first Ridley or my first Metroid game that I say this:
Metroid Prime's Meta-Ridley was the best Ridley in the series. In fact, the Space Pirates on the whole were far better in Prime than they were any other game in the series.
Prime was the game that made the Space Pirates behave the way they were always supposed to. Not just mere mindless Koopa Troopas with lobster-claw guns, but thinking, planning entities.
A lot of people will say "oh, that's just because of the Pirate Logs, and there's no way to get those on the Super Nintendo". But that's not true. I'm willing to accept the manual as the only way to work that sort of story element into the minimalistic media of a SNES cartridge. I have been gaming on PCs for almost as far as my memory stretches, I'm well used to games that use manuals as their primary method of storytelling. But it goes beyond that.
Look at the Space Pirates in Super Metroid. What can you tell me about them. They're lobster guys, and they like to wander caves and shoot at Samus. Fantastic.
Now look at the Space Pirates in Metroid Prime. What can you tell me about these guys? Well, we find them in laboratories, power stations, scouting outposts, starships. They're clearly more organized and more intelligent, even without the cutscenes fleshing them out.
We know they could have built levels like that in Super Metroid. Ceres station is clearly a giant research lab, so they can make that sort of environment. So why are so many Space Pirates just wandering random caves and empty hallways? These are the guys who are going to destroy the Galactic Federation? Yeah, right.
Ridley is much the same way. We're told he's the hyper intelligent leader of the Space Pirates, but we don't actually get to see it. Until Prime.
Meta Ridley is what Ridley always should have been. It doesn't matter how strong you are, how fast you are. When you're the leader of a spacefaring culture that is essentially at war with every species it meets, you have no excuse to go into battle barehanded. Ridley essentially took a knife to a gun fight when he went up against Samus. Now, admittedly, he was incredibly powerful, and he did put up a good fight. But he still got wasted because he was trying to fistfight someone who had a gun that can shoot through walls.
So what does he do? He says "I'm a giant dragon, I can carry some weight. I'm going to put some frelling armor on". Brilliant. He then adds cybernetics to make himself stronger, enhancers to his plasma breath. He outfits himself fully for war, using the incredible technology the Space Pirates have at their disposal. And it's AWESOME.
Sure, he still loses, but it just makes so much more sense. He powered through so much, his body's natural resilience and tail that can apparently cut through diamond letting him plow through most situations with personal strength, but when he was overcome, he sat down and changed. That's using that brilliant mind. That's how I always imagined Ridley acting.
So of all the Ridley incarnations, Meta Ridley is my favorite. And Metroid Prime is my favorite Metroid game, not just because it's the best first person game ever created, not just because it's the best translation of core gameplay experience across different mechanical systems ever seen, but because it breathed life into the world of Metroid in a way that no other game before it had.
I hope we get Meta Ridley as an alt costume. Ridley's coming to Smash for war. He'd better come prepared for it.