Cast * Horrid Henry as Arthur/Wart * Dr.Cockroach (Monsters Vs Aliens) as Merlin * Speedy Gonzales as Archimedes * Igor as Sir Ector * The Oz (Fanboy and Chum Chum) as Sir Kay * Ultimate Humungousaur (Ben 10 Ultimate Aliens) as Sir Pellinore * Nemo as (Finding Nemo) as Fish Wart * Dory as (Finding Nemo) as Fish Merlin * Dexter (Dexter's Laboratory) as Merlin as a Squirrel * Dee Dee (Dexter's Laboratory) as Granny Squirrel * Po the Panda (Kung Fu Panda) as Arthur/Wart as a Squirrel * Minnie Mouse as Scullery Maid * Aladar (Dinosaur) as Bird Wart * Charmcaster (Ben 10 Alien Force) as Madam Mim * Ja-Kal (Mummies Alive!) as Black Bart the Knight * Merlin's Animal Tranformations - Sparks (Aliens in The Aliens), Roger Rabbit (Wh