Family Feud - Popular Vs Freaks & Geeks (found episodes of Pearson game show; 2000)
From The Lost Media Wiki
Status: Partially found
Members of the cast of Freaks and Geeks appeared on Family Feud in early 2000 appeared on "Family Feud", hosted by Louie Anderson, against the cast of the WB's "Popular", playing for charity. It is reported that 5 shows were aired and the cast of freaks and geeks won at least twice.
Youtuber by the name of BeingCryptic uploaded in 2018 a 2 minute clip of the show. The user stated he doesn't own the full show.
Other then that, there's an archived article showing detailing the show and posting a couple screenshots.