The Little Engine That Could/Rocko's Modern Life

Cast

 * Eric as Rocko
 * Handy Pandy as Heffle Wolfe (they both start with "H")
 * Chip as Filbert
 * Buster (from Toy Story 2) as Spunky
 * Farnsworth as Ed Bighead
 * Pete as Peaches (they both start with "P")