Battle of the Universes is one of the goals in Futurama: Worlds of Tomorrow. It is a side goal in the event An Xmas Xarol, Act 2.
Learn about PVP.
5 50 It's time to battle the alternate-universe version of ourselves. You'll have a whole menu of universes to choose from.
How am I supposed to choose? I mean, if TV teaches us anthing, there's at least five or six alternate universes out there.
Choose however you like. I'm going to fight the Professors who've achieved more than I have.
What if they've achieved more in the area of weaponry?
It won't help them. No matter how many alternate universes there are. I'm the most lowdown, dirtiest street-fighin' Professor there is.
Picking my opponents was easier than I thought!
Really? What method did you use?
An old Fry family secret we call "eeny meeny miney mo".
You fool! 26th-century physicists proved that "eeny meeny miney mo" is biased in favor of the worst possible outcome!
I know that. The Fry family secret is to stop on the final "miney".
Battle with other people!
5 100 It's up to us to protect our univers from alternate-universe invaders.
But didn't we initiate the aggression by opening a door to their universes?
Ooh, look at Mr. "I Respect the Norms of Interplanetary Warfare"! Get this through your thick head, Fry: the only law is "kill or be killed"!
As long as I have two options, I'm happy.