Harold is the Purple Hare from Class of 3000 OC and his voice by Tom Kenny.
Harold (Class of 3000)
He played Rabbit (Winnie the Pooh) in The Many Adventures of Clifford the Big Red Dog, The Tinky Winky Movie, Clifford (Winnie the Pooh), My Friends, Tinky Winky and Clifford[]
He is a Rabbit