Ansem is controlling Riku's body while Riku still has very little control of his heart.
Well, Riku (if you are talking about in KH1) was possesed by Ansem, or Xeharnorts (I cant spell it lol) Heartless. It was not really him. Riku was never bad when he was actually not possesed.
the name to distinguish KH1 Riku. Riku(normal) was the boy on the island, dark Riku was the heartless lord, with the armor previous to ansem, seeker of darkness infiltrating his body, where he is named Riku-ansem. Riku with the cloak is called cloaked Riku, and Riku that looks like ansem, seeker of darkness doesn't have it's own designated name. Claification, dark Riku is the Riku wearing the heartless armor, commands heartless and works for maleficent before ansem, seeker of darkness abducts him.
It depends on who "Ansem" is, because there are really 3 different "Ansem"':One is the real Ansem the Wise who disguises himself as DiZ because the other 2 Ansem's take his identity.One fake "Ansem" is Xehanort's Heartless, who calls himself Ansem but is really the antagonist of KH1.The third "Ansem" (the second fake Ansem) is Riku-Ansem: after Riku takes off his black blindfold at Memory's Skyscraper in order to gain enough dark power to defeat Roxas, he permanently turns into Riku-Ansem, who is really Riku but now looks like the other fake Ansem and has more combat power.Since all Nobodies are created from the creation of Heartless, Xemnas is the Nobody of Xehanort's Heartless, Ansem.
Riku-Ansem looks like the fake Ansem.
Riku-Ansem is identical to Ansem, which is the Heartless of Xehanort.
Ansem/Maleficent convinves Riku to give into darkness so that he may obtain dark powers which he thinks he can use to regain Kairi's heart. However, Ansem is really just using Riku as a host. So technically, he doesn't turn into Ansem; the two are still different people.
There was no Ansem in Kingdom Hearts 358/2 Days. However, there was Riku-Ansem (Riku's dark side) but Riku was still a good guy. In the other games, Ansem the Wise is a bad guy.
SpoilersXehanort had turned into a Heartless that called himself Ansem and controlled Riku. So technically, yes, it was Xehanort, but then no, it was his Heartless. The point is, the real Ansem was a good guy, not the one controlling Riku.
KH 3d is The newest game in the Kingdom Hearts series, and you get to play it on the brand new 3ds which is the 3rd generation in the Nintendo DS, which is now very very old. You get to play as Sora or Riku, and the boss fir sora is Xemnas, Organization XIII leader, and the boss for Riku is Ansem. Ansem is the boss you battle in KH1. This will probably be the best KH game ever!
SPOILERNo. The first Ansem was Xehanort's Heartless impersonating Ansem. The second Ansem was Riku, who released the darkness in his heart to change himself into a man that looked like Ansem. Riku did so to be able to wield the power of darkness and protect Sora without darkness consuming him.
Riku didn't pretend to be Ansem. Riku's heart was engulfed by darkness and Ansem lays dormant inside of him. When Riku 'submits' to the darkness, he takes Ansem's appearance and must wear a blindfold to cover it up. (hence the blindfold we see throughout Kingdom Hearts II and Kingdom Hearts 358/2 Days)
Ansem persuaded Riku to submit to darkness by convincing him that darkness is superior. Because of Ansem's dark influence, Riku is most likely stuck with a dark heart, although he learns to control and use it to his advantage.