Zombie Badger said:
Wasn't Giygas a fetus, or am I remembering it wrong? That would make it even more Giger-ey to be honest.
Nah, that's just some insane fan theory.
Except... it sort of has water?
In the first game, he was called Gigue or something (pronounced googly or something like that; this is nodded to in Earthbound) and he is a fully formed alien, after the main character because he got the love and care that Google never got from his adoptive parents, who are the protagonist's grandparents. Freud freud freud, anticlimactic but still emotional boss later, and he's dead. Except not.
But in Earthbound, the main characters go back in time to fight Gigyas before he gains power and kill him, thus causing a time paradox that erases Ness's existence (if he is the first game's protagonist's son, like he's implied to be) and thus the defeating of Giddy or whatever.
I don't know, Itoi has sometimes said yes, sometimes said no. Sometimes said, he is, but he retains the knowledge from the first game, making him an insane, violent infant of sorts without any sense of restraint...
Really, it just muddles the whole thing up more when you consider the multiple Word of God(s).