- Heinrich Von Marzipan as Percy (I Know Heinrich Von Marzipan is Bad)
- Numbuh 2 as Thomas
- Numbuh 60 as Henry
- Numbuh 1 as Gordon
- Numbuh 4 as James
- Noddy (from Noddy's Toyland Adventures) as Sir Topham Hatt
- Tails (from Sonic The Hedgehog) as Harold
- Michael Angelis as The UK Narrator
- Alec Baldwin as The US Narrator
- Heinrich Von Marzipan: I get dirty., I need ze vashdowns!, Herr vone only does it to feel important!
- Numbuh 1: I am important. I'm the English Kids Next Door Operative.
- Numbuh 4: You're a candy obesser, Heinrich.
- Heinrich Von Marzipan: No, I'm not!
- Numbuh 2: You look good enough to eat!
- Numbuh 4: Pudding Heinrich!
- Numbuh 60: Chocolate popciles on boots.
- Numbuh 1: Disgraceful!