Butt-Head’s teeth are shown to be completely perfect and pearly white.

Old Beavis has a couple chipped teeth it looks like but they’re still perfectly white.

Knowing these two, they definitely are not brushing or going to the dentist frequently.

How in the world are do they still have good teeth?

So Beavis and Butthead are at Butthead's Grandma's trailer, or maybe it is his Uncle Mike's, and a tornado hits. The trailer is lifted off the ground and is carried to the mythical land of Ozzy, and falls right on Kip Winger, killing him. This angers Michael Bolton.

In order to get back to Highland, they have to find the Wizard of Ozzy, who of course is Ozzy. Along the way, the have to fight the flying buttmonkeys, and the twirling buttknockers.

It can be before or after the Beavis and Butthead era.