Part of the fun/frustration of being a Funky follower is trying to figure out if Tom Batiuk is being deep…or careless and lazy. This page on the Funky Winkerbean site shows "model sheets" for each of the characters. Model sheets are used in cartooning to show a character's range of expression: http://en.wikipedia.org/wiki/Model_sheet.
Shown on this page are model sheets for Funky, Les, Crazy Harry…and some "cast members" who appeared briefly (comix geek-goth-gurl Alex) or a long time ago (van-driving date rapist Frankie) and several totally puzzling strangers:
Ally: a Westview teacher?
Carrie, a rather scruffy-looking teen
Eddie, a young Flavor Flav wannabe on wheels
Matt, a contemporary of Darin and Pete, I reckon
Monroe: Eddie's dad?
Sadie: Cindy's sister?
Update, April 5, 2011:
In addition to the above hinted-at but never seen characters, members of the Act I and Act II cast have not surfaced since the Second Time Jump of October 2007:
Chien, that rarity: an attractive Batiuk-drawn female
Frankie, rapist of Lisa/father of Darin Reappeared April 2013.
Jessica, who along with Darin got a lot of play in Act II Reappeared April 2011.
Wade, Funky's AA sponsor, who I found to be actually likable. It may be just as well that we haven't seen ol' Wade, though: TB has aged him in a particularly cruel manner. He's probably already dead. Resurfaced Christmas Eve 2011.
Also on the site, if you click on the link that looks like an asterisk, you get to view a "bonus" illustration-not drawn by TB-of the cast in sort of a shaded, 3-d look. I guess the young man on the right in the green schmatte is Cory during his gangsta phase…and check out the well-turned gams on Mrs. Bushka!