The David Show/Dexter's Laboratory

David Peart Jr. as Dexter (both Began With D and Both are Best Friends) Pinkie Pie (from My Little Pony Friendship is Magic) as Dee Dee, George (from Curious George) as Dexter's Monkey David Peart Sr. as Dexter's Dad Rosezaten Clark as Dexter's Mom Odd Todd (Odd Squad) as Mandark