Puccacules

Pucca as Hercules

Garu as Megara

Spongebob and Kitty Katswell as Zeus and Hera

Abyo as Philoctetes

Rainbow Dash (My Little Pony: Friendship is magic) as Pegasus

Hades as Himself

Yakko and Wakko (Animaniacs) as Pain and Panic

Ho as Hermes

Plankton as River Guardian

Muses as themsevles

Kimi and Tommy (Rugrats) as Herc's Earthly parents

Dot (Animaniacs) Ella (Yin Yang Yo) and Angelica (Rugrats) as 3 Fates

Terk, Tantor, Pumbaa, Winifred Colonel Hathi and others as Townspeople

Hydra as Itself

Chernabog, Dragon Maleficent, FireBird, and Genie Jafar as Titans

Giant Squid (Jimmy Neutron) as Cyclops

Uncle Dumping as Ares, god of war

Other people and Ring Ring as Various gods

Diamond Dogs (My Little Pony: Friendship is Magic) as 3 Headed Dogs