Kingdom Hearts II Question

Uhm, this may be a dumb question, but in the scenes where Axel comes to get Kairi, and Pluto follows him, who is opening the Corridors of Darkness? I can see Riku sometime after, but is he the one opening them, and the King is just whistling through them, and they both are running/hiding before Pluto and Kairi can see them as they go through them, or is Mickey doing all that with Riku by his side?

 

I have always thought that it was just Riku opening the portals. Cause at the of the game he tried to open a portal but he couldn't cause the darkness wasn't who he was anymore.

 

I always wondered the same thing, but now that I really put the pieces together, it could've been Riku. Because whoever opened those corridors saved Kairi from Axel the first time, and the only person who'd do that was Riku, because the King was too busy tracking down Ansem. And when Saix stole Kairi from Axel later, and Kairi was escaping with Namine and Saix caught them again, Riku came in and pwned Saix pretty hard. So why wouldn't Riku have done it earlier? It makes sense.