"What are you busy doing? The battle's already begun, so why aren't you going outside?"
The liches gathered their mana and summoned a thick blanket of dark clouds that blotted out the sun, while skeleton mages summoned a never-ending sea of skeletons. With a fierce intent to do battle, the infinite amount of cannon fodder arrived on the battlefield. The fighting had reached its peak…. Just joking!
Although the first part of all that was true, it wasn't important.
The undead indeed began their battle against Oak Town. But strangely, they seemed to be highly unmotivated. The battling wasn't fierce at all. High-level undead troop types like Abominations weren't even sent out.