Apex is an evil overlord pac-alien that first appeared in Robo Woes, his plan is to take over Pacworld and capture Pac-Man, Betrayus and President Spheros. He is the true main antagonist of the series.
Not much is mentioned about Apex's past except that he lives on planet pointy head and that he hired the Pacinator at some point. Then after the pacinator possibly delivered Zac and Sunny to him, he took them to his home planet. Apex then later appeared in Robo Woes to give President Spheros a gift (which was actually a trap to rule Pac world), but was defeated by Pac and escaped in his robot suit. Apex appeared in Invasion of the Pointy heads to make an agreement with Betrayus to conquer Pac-world, but later betrayed him. He escaped with his army after Pac and Betrayus discovered his weakness and then told Pac if wants to give a message to his parents, but then leaves leading a trail of energy.
Apex and the pac-aliens are killing the yellow pacworlders (the yellow ones).