Riku Replica, also referred to as Repliku, is a Replica of Riku created from the data Vexen had gathered. He appeared in Kingdom Hearts: Chain of Memories and Kingdom Hearts Re:Chain of Memories and eventually becomes a redeemed villain of the game.

Though he almost always appears in Dark Mode, the only time when he did not have this suit on is his debut in either storyline. Originally a subject to test the real Riku, the Replica was later exploited to become a puppet of Marluxia who attempted to use him to manipulate Sora and overthrow the Organization.