Lisa shows Gary what's going to happen in the future, only to reveal that Wyatt will end up stealing Gary's date to the prom. Wyatt tries to change the outcome of the future by having Lisa give him the worst personality that she can create. She zaps up a pair of magical Chett underwear, giving Wyatt Chett's personality. Unfortunately, Gary's date likes the new Wyatt even more and Chett is happy because his brother is finally becoming cool.

Wyatt and Gary think that being a genie would be easy. Lisa thinks that being a teenager and going to high school is easy. So, they switch places. The now teenage Lisa falls head over heels for the popular guy at school, Lyle, and tries to make friends with girls who aren't very accepting of her. Meanwhile, the guys try their luck at zapping up things, messing up every time.gets turned into a poodle

Gary is dumbstruck when he finds out that his relatives weren't all cowards and losers. He has an ancestor named Red Brick Wallace, a gunslinger from the old west. Lisa zaps them back to the old west in order to meet Red Brick Wallace. Unfortunately, he turns out to be nothing more than a spittoon polisher. The guys are now on a mission to save Red Brick Wallace from getting shot by the sheriff, who looks strangely like Chett.

Gary, Wyatt, and Lisa all decide to go clubbing after hours and become ""creatures of the night."" Lisa turns them all into cool vampires, except the fact that they crave Yoo-Hoo instead of blood. Being vampires gives the guys new powers. They now have the ability to hypnotize people, which they enjoy using on cute women. The night turns out to be not so great when they find themselves with a real group of bloodsucking vampires. Principal Scampi and Chett are determined to stop the vampires and become vampire hunters.

After receiving too many memory-wipes from Lisa, Chett develops a brain callous that no longer allows his memory to be erased. This allows Chett to know about Lisa and the fact that she's a magical genie. Of course Chett wants to do harm instead of good. He immediately tries to lie, bully, and buy his way into getting his very own genie from the guys. Unfortunately, instead of a genie, he gets a nice ride to the insane asylum.