Suggestions by @giorenzo

Stephen Quire

as Stephen Quire in Leopold Slikk & His Friends Misbehave At The School Dance Party/Grounded

Ron Yuan

as Kaeru Otoko in Leopold Slikk & His Friends Misbehave At The School Dance Party/Grounded

Seth Green

as Ronald Ramirez in Leopold Slikk & His Friends Misbehave At The School Dance Party/Grounded

Norman Kochanowski

as Leopold Slikk in Leopold Slikk & His Friends Misbehave At The School Dance Party/Grounded

Edward Bosco

as Alastor in A Very Special Digital Circus Song (Crossover)

Jill Harris

as Charlie Morningstar in A Very Special Digital Circus Song (Crossover)

Corey Burton

as Ironhide in A Very Special Digital Circus Song (Crossover)

Bill Fagerbakke

as Hot Shot in A Very Special Digital Circus Song (Crossover)

Tara Strong

as Alarmus in A Very Special Digital Circus Song (Crossover)

George Takei

as Yoketron in A Very Special Digital Circus Song (Crossover)

David Kaye

as Warpath in A Very Special Digital Circus Song (Crossover)

John Moschitta Jr.

as Blurr in A Very Special Digital Circus Song (Crossover)

Phil LaMarr

as Jazz in A Very Special Digital Circus Song (Crossover)

Jeff Bennett

as Ultra Magnus in A Very Special Digital Circus Song (Crossover)

Townsend Coleman

as Sentinel Prime in A Very Special Digital Circus Song (Crossover)

Cree Summer

as Blackarachnia in A Very Special Digital Circus Song (Crossover)

Bumper Robinson

as Blitzwing in A Very Special Digital Circus Song (Crossover)

David Kaye

as Lugnut in A Very Special Digital Circus Song (Crossover)

Tom Kenny

as Starscream in A Very Special Digital Circus Song (Crossover)

Corey Burton

as Megatron in A Very Special Digital Circus Song (Crossover)