GoAnimate/Hercules

Henry (from Kablam!) as Hercules

June (from Kablam!) as Megara

Gage Creed (from Pet Sematary) as Hades

Skunk & Rabbit (from Skunk Fu!) as Pain & Panic

Twilight Sparkle (from My Little Pony: Friendship is Magic) as Hydra

Rainbow Dash (from My Little Pony: Friendship is Magic) as Cyclops

Fluttershy, Pinkie Pie, Applejack & Rarity (from My Little Pony: Friendship is Magic) as The Titans