bellerophon ate his kid
Because Bellerophon was attempting to fly up to Mount Olympus.
No, by Perseus.
Perseus. Bellerophon killed the Chimera, Theseus killed the Minotaur, and Heracles completed the 12 labors.
He had a brother that he accidentally killed.
The young corinthian prince Bellerophon killed the Chimera, a beast with a head of a lion, the horns of a goat and a tail of a snake....
Chimera was killed by Bellerophon, astride Pegasus,
Pegasus was tamed by Bellerophon, who rode him into battle against the fire breathing monster name khiamaira. He then tried ride him up to heaven but Zeus caused the horse to bucked which knocked Bellerophon back to earth. Pegasus made though and became a thunderbolt bearer for Zeus.
no one killed Zeus!!
Bellerophon and Pegasus' first trip together was to Lycea, to slay the Chimera. Years later, Bellerophon tried to fly on Pegagus to the gods' home on Olympus. Zeus caused a gadfly to sting Pegasus' tail, causing him to buck and accidentally throw Bellerophon to his death.
The powers that were at the time wanted Bellerophon dead so they kept challenging him with tasks they felt would get him killed. He was not killed but rather accomplished each task he was given unscathed. Bellerophon was also involved in doing God's work and killing Nephilim. He will soon be doing that again when the Nephilim return because Bellerophon is already here, waiting to be given his next task.
Bellerophon had murdered either his brother, whose name is usually given as Deliades, or killed a shadowy "enemy", a "Belleros" (though the details are never directly told).
Bellerophon is not a god. He wasn't even the son of a god. In fact, he was one of the very few heroes that wasn't a demigod, though he did have divine heritage (and while some tellings say that he was the son of Poseidon and the king's wife, the retelling of the myth by his own grandson makes no mention of Poseidon). Bellerphon is well-known because he is the hero that killed the chimera and tamed Pegasus. After he killed the monster, though, his hubris got the better of him and he attempted to use Pegasus to reach Olympus. Zeus, angered by this, sent a gadfly to pester Pegasus, who threw Bellerophon from his back. Pegasus made it to Olympus where Zeus used him to shuttle his thunderbolts from the forge of the Cyclopes. Bellerophon fell into a briar patch, which blinded him. He died a doddering old man who shunned the company of other people. He is also one of the extremely few heroes not to be immortalized in the stars.