Ridley can never decide on a specific shade of purple...1. That's meta ridley. So does that mean that Metroid Prime is now canon by Sakamoto?
2. Why does ridley look so oversatured with his skin?
Anyways, in the Metroid canon, Ridley was killed in the first game and repaired with cybernetic implants (Meta Ridley). Samus Returns shows him slowly recovering out of his cyber parts and becoming the Ridley seen in Super Metroid (until he's killed again). I'm pretty sure the Prime games are seen as semi-canon, lol.