Suggestions by @cartoonmultiverse

Donatello (TMNT 2012)

as Donnie in Tmnt & Sonic: Golden Darkness (Part 4)

Michelangelo (TMNT 2012)

as Mikey in Tmnt & Sonic: Golden Darkness (Part 4)

Green Lantern (DCAU)

as John Stewart/Green Lantern in Tmnt & Sonic: Golden Darkness (Part 4)

Wonder Woman (Justice League: Doom)

as Diana Prince/Wonder Woman in Tmnt & Sonic: Golden Darkness (Part 4)

Human Torch (Marvel Cinematic Universe)

as Johnny Storm/Human Torch in Tmnt & Sonic: Golden Darkness (Part 4)

Steven Universe (Character)

as Steven Universe in Tmnt & Sonic: Golden Darkness (Part 4)

Master Splinter/Hamato Yoshi (TMNT 2012)

as Master Splinter in Tmnt & Sonic: Golden Darkness (Part 4)

Ben Grimm/The Thing (Storyverse)

as Ben Grimm/The Thing in Tmnt & Sonic: Golden Darkness (Part 4)

The Invisible Woman ( Fox Universe )

as Sue Storm/Invisible Woman in Tmnt & Sonic: Golden Darkness (Part 4)

Hawkeye (Marvel Cinematic Universe)

as Clint Barton/Hawkeye in Tmnt & Sonic: Golden Darkness (Part 4)

Nya (Lego Ninjago)

as Nya in Tmnt & Sonic: Golden Darkness (Part 4)

Cole (Ninjago)

as Cole in Tmnt & Sonic: Golden Darkness (Part 4)

Scootaloo

as Scootaloo in Tmnt & Sonic: Golden Darkness (Part 3)

Sweetie Belle

as Sweetie Belle in Tmnt & Sonic: Golden Darkness (Part 3)

Apple Bloom

as Apple Bloom in Tmnt & Sonic: Golden Darkness (Part 3)

Hank Pym/Ant-Man (Avengers: EMH)

as Hank Pym/Antman in Tmnt & Sonic: Golden Darkness (Part 3)

Professor Charlies Xavier

as Charlies Xavier in Tmnt & Sonic: Golden Darkness (Part 3)

Mr Fantastic ( Storyverse )

as Reed Richards/Mister Fantastic in Tmnt & Sonic: Golden Darkness (Part 3)

Doctor Doom (Marvel Cinematic Universe)

as Victor Von Doom/Doctor Doom in Tmnt & Sonic: Golden Darkness (Part 3)

Bumblebee (Transformers Film Series)

as Bumblebee in Tmnt & Sonic: Golden Darkness (Part 3)