Kingdom Hearts Abridged Edit
Riku appears as a vague antagonist just like in the game but starts off as a good friend to Sora and Kairi, after Darkside destroys Destiny Islands Riku ends up sided with Malificent. As part of Malificents group he has been ordered to retrieve Pinnochio from Monstro.
His best friend is Sora. Out of the two, Riku is shown to be the straighter of the two. He hates when Sora touches him, and tries to ignore his homosexual remarks. However, Riku is shown to be gay himself, where is crush is Sora, as shown in Episode 8. He also hates when people spell Auron wrong.
Disorganization XIII Edit
Riku appears as a side character in episode 3. He comes to the Organization to attempt to join it, but is rejected by the group and kicked out by Roxas. He returns and has to pass a set of tests so he can join.