The PacWorld wars 1 and 2 was an event prior to the series. Betrayus and the other bad PacWorlders were defeated and removed of the bodies and sent into the Netherworld.
Pac-Man's parents were murdered, making him the last survivor of the yellow PacWorlders.
Betrayus is defeated along with his troopers and sent to the Netherworld.
Dr. Buttocks possibly lost a hand which is why he has a claw in place.
Sir Cumference possibly lost a hand which is why he has a robot glove in place.
The Pac-People won the war.