My Little Pony/Dexter's Laboratory

Cast
Twilight Sparkle as Dexter

Pinkie Pie as Dee Dee

Fluttershy as Lee Lee

Rarity as Mee Mee

Mrs. Cake as Dexter's Mother

Mr. Cake as Dexter's Father

Dr. Whooves as Tall Dexter

Rainbow Dash as Pony Puff Princess