Nessus the centaur gave Heracles' wife a cursed cloak and tricked her into giving it him. When he put it on he began to burn and was dying when his father Zeus picked him up and placed him among the stars as an immortal.
skyros killed him by pushing him off a cliff when he was no longer popular in Athens
No one killed Perseus. He was one of the few greek heroes that wasn't murdered, mauled or cursed by the gods. He died of old age with his wife Andromeda.
She was killed by Heracles, who mistakenly thought that she had betrayed him.
Perseus. Bellerophon killed the Chimera, Theseus killed the Minotaur, and Heracles completed the 12 labors.
The oracle of Delphi, i think
her name was Megara
Heracles' (Herakles) attributes are the lion skin (the one he killed in his first labor) and the club. Some also say that arrows (that were dipped in poison during another labor) is also an attribute.
She was killed by Heracles, who mistakenly thought that she had betrayed him.
Heracles.
Perseus. Bellerophon killed the Chimera, Theseus killed the Minotaur, and Heracles completed the 12 labors.
It was referred to as the Nemean lion.
Cycnus.
The oracle of Delphi, i think
her name was Megara
Hercules/Heracles killed the Nemean Lion and the Hydra.
He owes it to Heracles, who killed the eagle and broke his chains.
No; Cerberus was only defeated by Heracles, never killed.
The Lernean Hydra is killed by Heracles in his second of twelve labors. However why the Hydra is killed is never fully explained.
No, Cerberus was never killed, it was dragged out of Hades by Heracles but never slain.