They DON'T open both. The pomegranates only open Hades' door to the underworld put them on his alter in Mythology Island. To open Poseidon's door to his his awesome beach, you need the starfish off of his statue in the museum.
They are both gods of the sea, although the Greek Posiden is more popular and has more known about. But, neither one is better, the are both Greek Gods.
Kronos did. He's not a god though, he's a titan. Kronos swoled, POsiden and Hades. Zeus saved them by tricking him into eating a brick. When he screamed, they both jumped out.Kronos was afraid they would over power him.
The Greek God Poseidon's animal was the horse. He created the horse and in accompany Athena created the carriage and so forth for the first time Athena and Poseidon both worked together and created the horse and carriage.
Hades had a "cap of invisibility." The Helm of Hades made the wearer invisible to both gods and mortals.
both, because hades is supposedly the reason why we have summer and winter
Both are related to Persephone - Hermes her brother through Zeus, and Hades her uncle through both Demeter and Zeus. Both also dealt with the dead, Hermes took the souls to the underworld, where Hades reigned over the dead.
Poptropica is a great game for both boys AND girls.
Hades is both the underworld in Greek mythology and the name of the god who presides over that realm.
The only things I can think of are: They are both Olympian Gods and hades was Athena's uncle.
Hades, being the brother of both Demeter and Zeus, the parents of Persephone, was her uncle.
Hades is both the King of the Underworld and god of wealth and host of the dead who dwell in the Underworld which is sometimes called Hades.
Technically Both.