Giant robot battle. Let's give a scenario:
Coop, whilst in Megas, decides to go without Jamie or Shiva to Paradigm City in order to get a special localized only Slush. Because he's in a giant robot and causing destruction, Roger calls out Big O to deal with this supposed Megadeus.
Here are the win conditions:
-Destroy/Incapacitate opposing mech
Battle conditions are as follow:
-Limited to use of weapons as listed on their wikis (limiting Megas' ability to use whatever is funny)
-Field of battle is Paradigm City (some home field advantage for Big O)
-Time of day is midday, weather conditions are fair.
-No outside assistance.
Megas Wiki: Here
Big O Wiki: Here