Saved by the Bell Question
 

In the episode where Lisa breaks her foot and gets stuck with Screech for the big dance contest, what name did Slater and Kelly go by?

Zack and Jessie were the Powerhouse Preppies I know that one.

"The exciting Spandex Twins," according to Casey Kasem.

Good thing the show's on DVD now, so I was able to check for you. :)