Beating Omega Weapon

[Opalex]

How can I beat Omega Weapon?
Can you suggest a strategy or best characters to use to defeat it?
Is it necessary to beat Omega Weapon to reach the final boss?

[Hadoken]

umm, omega should be pretty easy if you leveled up right.
i killed him before he had his turn.

[Sword 4 Hire]

No he's just a sidequest...Yeah I beat him with one good Blitz Ace...just level in Omega Ruins for awhile.