Every Pixar character voiced by 'Cliff Clavin' actor John Ratzenberger

Actor John Ratzenberger may be forever known to TV viewers as Cliff Clavin on "Cheers" (1982-93), but he's also been called Pixar's "good luck charm." That's because the 71-year-old actor has done voice work for all 20 Pixar films, including the just opened "Incredibles 2." Here's a chronological list of Ratzenberger's Pixar characters:

Hamm in "Toy Story" (1995), "Toy Story 2" (1999) and "Toy Story 3" (2010): By far Ratzenberger's best-known Pixar character, this piggy bank is chock-full of great one-liners and quips, whether it's trading jokes with Mr. Potato Head or making snide put-downs about Andy's neighbor Sid. And then there's our favorite, his tongue-in-cheek admiration for Buzz Lightyear: "Ooh, impressive wingspan. Very good."

P.T. Flea in "A Bug's Life" (1998): In his most exuberant Pixar performance, Ratzenberger plays a parasite in the circus industry. Signature line: "There was a line of flies outside the tent, went on forever. It must've been a foot long!"

Yeti in "Monsters, Inc." (2001) and "Monsters University" (2013): The actor showed his lovable side as the banished abominable snowman. All he wants is to be liked, even if he does want to serve "lemon" snow cones.

Fish School in "Finding Nemo" (2003): Ratzenberger portrays a school of fish that loves doing impressions and mocking sourpusses such as Marlin.

The Underminer in "The Incredibles" (2004) and "The Incredibles 2" (2018): It was starting to look like Pixar went a whole movie without Ratzenberger, but then he showed up at the very end as a new baddie for the superhero family, a mole man with a gigantic drill called the Underminer. The sequel picks up right where the original left off with the Incredibles doing battle with Underminer.

Mack in "Cars" (2006) "Cars 2" (2011) and "Cars 3" (2017): Ratzenberger plays the traveling big-rig truck to Lightning McQueen named Mack. The original ends with a credits sequence featuring Mack at the drive-in theater, watching car versions of every movie in the Pixar family (all of which feature his voice). "They're just using the same actor over and over," he says. "What kind of cut-rate production is this?!"

Mustafa in "Ratatouille" (2007): Ratzenberger puts on his best French accent to play a neurotic waiter.

John in "WALL-E" (2008): He makes a quick appearance as one of those bloated humans aboard the Axiom as WALL-E tries to track down EVE.

Construction Foreman Tom in "Up" (2009): Playing the foreman who offers Carl Fredricksen a big haul to sell and demolish the precious house he shared with his late wife, Ratzenberger's character gets a faceful of leaf blower early in the movie.

Gordon in "Brave" (2012): In another blink-and-you'll-miss-it cameo, Ratzenberger voices a castle guard.

Fritz in "Inside Out" (2015): Ratzenberger plays a brain cell serving as a repairman for the board operated by young Riley's feelings.

Earl in "The Good Dinosaur" (2015): Pixar's most disappointing film features another short cameo, with the actor voicing a Velociraptor that's part of the main villain's gang.

Husband Crab (Bill) in "Finding Dory" (2016): Rather than reprising his role as the school of fish from "Finding Nemo," Ratzenberger played a husband crab who snips grass just before Dory slips into some pipes to escape her new aquarium home.

Juan Ortodoncia in "Coco" (2017): While "Coco" is mostly made up of a Latin cast, directors Lee Unkrich and Adrian Molina still found a spot for Ratzenberger. He plays Juan Ortodoncia, one of the traveling souls on the Day of the Dead, seen getting his photo snapped while crossing the border to the real world.