Heracles did not "defeat" any of Medusa's brothers and sisters, for they were immortal. Further, the mortal man who killed Medusa with aide of Athena was Perseus - not Heracles.
Hercules did not kill Cerberus.
go defeat Zeus
The weakness of Hercules is humus or deadly pride he believed that nothing could defeat him and that is how he died
You have to defeat Cloud in the Hercules cup.
They both have unhuman strength and both had to defeat creatures
The second labour of Hercules was to defeat Hydra
eat them
You don't need to defeat him. Athena said he would help, but only for the final stages. Find the 5 sacred items and return them to the Tree of Immortality. Get the Touchscreen Mirror from Aphrodite's test, as Hercules does not like to walk very far.
Four siblings (2 brothers and 2 sisters) come from England into a magic land called Narnia. There they defeat a witch and are crowned kings and queens. But that is only one book out of seven.
You go to Hercules and he will help you. You need to go to Hades Throne Room where Hercules will push the bolder out of the way. Then Hades will give you his crown. Don't forget to use the mirror. Then go to Poseidon with Hercules and he will smash the wall. Go into Poseidon's Throne Room and he will give you his Trident. Finally you will be able to defeat Zeus. If Hercules isn't with you anymore, he is in his chair in Heroes Hut. Later you will eventually defeat Zeus and get the gift of immortality. By the way when you defeat Zeus, you keep Hades crown and Poseidon's Trident. Put on both of them and then press the space bar.
defeat it with bombs
Complete Neverland, defeat the Phil Cup, Pegasus Cup, and Hercules Cup in the Colliseum, then use the yellow trinity (which you obtain from the Hercules cup) that's next to the heavy box.