A gag rewrite of an Armada comic had Hot Shot acting like a crackhead obsessed with a jar of jAm (it gets spelled differently throughout the comic, as he's talking in Lolcat-speak the whole time. "JaAm" is about the only permutation we never see.) - which was originally a jar of Technicolor Science-afflicted Applied Phlebotinum.
It's since slipped into canon; at least one character profile says the other Autobots are puzzled by what "JaAm" is.
In the GBA TMNT video game each of the individual turtles are healed eating their favorite foods, Leo's food is sushi and Don's new favorite food is the hamburger Raph and Mikey's favorite foods remained unchanged.
The fourth film attempted to give Splinter one (although the scene was cut another one referencing it left in): Cake.
He's also quite fond of fresh vegetables, soups, tea... and cheese. Some versions show him with a taste for Japanese fare, including sushi.
If her official profile is anything to go by April O'Neil is a big fan of chocolate
Elisa Maza from Gargoyles has hot dogs as her favorite food. Broadway prefers jalapenos.
Monterey Jack, of Chip 'n Dale Rescue Rangers, has cheese, of course. The sight, smell, or mention of "chEEeeEEeeEEeeEESE" is enough to trigger a phenomenon known as a "cheese attack". The lengths Monty goes through to sate his desire for cheese can get him into trouble... or out of it. This was exaggerated to G-Rated Drug-esque porportions on "Mind Your Cheese & Q's" when Monty vows to quit cheese after yet another cheese attack nearly gets Gadget injured by a runaway kite and even suffers withdrawal in one scene.
In one cartoon, Monty claims that his absolute favorite cheese is brie '87 (as in a brie with a vintage of 1987). Nonetheless, in the same episode, he is successfully able to resist a villain tempting him with one.
Another time, Monty and the Rangers kept a local cafe open while its owner was on vacation and Monty's recipe for "cheese chowder" proved popular enough to keep the cafe busy and save the owner from having to close for good (as well as foiling a bank heist, as the bank robbers planned on tunneling through the abandoned cafe to get to the bank next door).
Scooby-Doo: Scooby Snacks. Shaggy likes them a lot too; in fact, Daphne and Velma can often use the snacks to convince both of them to do something they're to scared to do otherwise. And in at least one episode, when the duo is being chased by a monster, they come across boxes of them; after eating them, they get a second wind and are able to keep running.
For Shaggy, in the early days of the series, it was his patented Super Shaggy Sandwich.
Homer of The Simpsons: Donuts, porkchops, and Duff Beer in earlier seasons.
During the show's beginnings as animated shorts on The Tracy Ullman Show, the family would often celebrate good times by going out for Frosty Chocolate Milkshakes. This didn't carry over to the full-length episodes, however. (Except for the occasional reference.)
Ed, Edd n Eddy: Jawbreakers. Ed seems inordinately fond of buttered toast and gravy as well.
"Fond of"? Ed has a BATH filled with Gravy for no apparent reason. He even goes out of his way to protect it when Eddy tries to use it as a "gravy grave" when he temporarily becomes a supervillain of some sort.
Rolf and meat products in general. This becomes a plot point in one episode where several of the boys make a bet to give up a defining trait for as long as possible. Eddy had to give up yelling, Double D had to give up his advanced vocabulary, Johnny had to stop listening to Plank and so on. Rolfs and Ed's challenge was, of course, giving up meat and gravy. Neither of them lasted even a full day.
In an episode of The Real Ghostbusters the heroes are trying to find Slimer's Evil Counterpart, "Big Green" in a supermarket. While this would at first seem like the proverbial bull in a china shop, they can't find him. Then Ray asks Slimer what he would want if he could eat anything at all in the supermarket. Slimer quickly leads them to the ice cream freezer, and sure enough, Big Green is there.
Early seasons had Cheesy Poofs and pot pies as Cartman's favorite snacks. In later seasons, he's just a Big Eater and gets obsessed over any kind of fatty junk food that the plot requires.
In the bonus material of one season, Stone and Parker introduce each episode while performing a fake show called "Makin' Bacon with Macon," in which they feed pig parts to a pig. Macon loves bacon! As anyone who's ever been around pigs can tell you, cannibalism is by far the least of their indulgences.
Which is odd, because NONE of those animals are native to Australia, let alone Tasmania. (Well, ducks exist basically everywhere, octopi can probably be found in the ocean near Tasmania, and rabbits are feral pests in mainland Australia... but otherwise, all the other animals exist only in zoos in Australia.
Beavis and Butt-Head mainly subsist on gas station Mexican food, especially nachos and tacos. In fact, one of the few things that can make them show up for school is when its Taco Tuesday in the cafeteria. Sometimes they'll eat other junk food like pizza (in "Prank Calls") or burgers (any episode where they're shown working at Burger World).
Twilight Sparkle once devoured some hayburgers and horseshoe-shaped fries like a shark tearing into a seal, at one point using another burger to wipe the ketchup from the last two burgers off her face, and then that burger goes down the hatch in two bites.
Soarin' once went into total emergency panic mode over a risk to his pie, and then ate it like an actual horse instead of a Funny Animal.
Pinkie Pie had a very cute song about making cupcakes, which she suddenly launched into while Apple Bloom looked on in confusion, cute enough on its own and then it led to a grimdark fanfic of legend, so Pinkie and cupcakes are very much ingrained into the fandom.
With Derpy and muffins, we didn't even get a moment like that. Derpy was one of three background ponies whose mouths were moving when someone mentioned muffins; only a one in three chance it was actually her!
Also, in the human world, the Twilight can't figure out how to use a vending machine, and the alternate Trixie dramatically announces "THE GREAT AND POWERFUL TRIXIE—! ...needs some peanut butter crackers." and takes them with a "Voila!" Even though peanut butter crackers probably don't exist in Equestria, "our" Trixie has learned to love them in fandom.
Sonata Dusk, The Ditz of the villain trio in the second Equestria Girls movie, lets Big Bad Adagio Dazzle finish her rant about her Evil Plan and then says "And after that, can we have lunch? It's Taco Tuesday!" Let the Sonataco fanfic/fanart (yes, a Portmanteau Couple Name with a character and her favorite food is possible) commence!
Also, Princess Celestia and cake.
The Apple Family and apples. It's not just their favorite food, it's also their main source of income!
Rainbow Dash with the Apple Family's cider. She even freaks out at the idea that an infestation of fruit bats might prevent cider production.
Yogi Bear: anything in a "pic-a-nic" basket. Beats the alternative. "Nuts and berries? Yeech!"
Hank, being a propane salesman, loves steak and barbeque in general. His favorite drink is Alamo beer, to the point where he's very rarely seen drinking anything else.
Bobby in A Goofy Movie absolutely loves his "cheddar whizzy," to the point where he considers it an appropriate "fee" for his A/V expertise, will eat it straight from the aerosol can or from a massive blob in his hand, and has one with him in half the scenes he is in. The spray cheese is absent in the sequel... but he's equally eager about the "double cheesa" pizza he has at the end, and he helped his friends to immediately scarf down a big plate of nachos. Bobby really likes cheese.
Quick Draw McGraw's dog Snuffles is obsessive about dog biscuits, going into wild throes of ecstasy whenever he gets one, and becoming surly and uncooperative whenever he is denied one.
Pickles the Drummer of Metalocalypse loves cinnamon buns, Nathan Explosion is crazy for chips (he'll eat them nonstop if you let him) and Toki Wartooth adores candy. Also, Charles Foster Offdensen has quite a taste for pie- fandom will usually portray him having varying degrees of ravenousness for the flaky-crusted, fruit-filled dessert.
Numbuh Three has shown a love of popcorn in a handful of episodes, and Numbuh 5 loves candy and ice cream (even more than everyone else). In fact, many episodes that center around Numbuh Five have her seeking out ancient artifacts that have something to do with both, in a clever parody of Indiana Jones movies. Her friend-turned-enemy Heinrich Von Marzipan and her frienemish arch enemy Stickybeard shares her love for candy.
Numbuh One also seems to like meatball subs, although Lizzie claims that they go straight to his already big butt, and for all kids chicken nuggets are as valuable as gold.
Spike from My Little Pony: Friendship Is Magic absolutely loves eating gemstones, at the point that his love for them has been used as a little plot device now and then. When gemstones are unavailable, he seems pretty fond of ice cream. When Twilight Sparkle was busy trying to avert a coming disaster, he ate an entire tub of it just because she was too distracted to tell him not to.
Pinkie Pie loves sweets in general, but cupcakes are most commonly seen as her favorite, thanks to the "Cupcakes" song in "Call of the Cutie".
She also loves chocolate.
According to fanon, Derpy Hooves/Ditzy Doo really likes muffins. This was born from a blink-and-you'll-miss-it moment in "Applebuck Season" where she hungrily says, "Muffin," from the background - not only blatant Flanderization, but not even wholly reliable due to the fact that two other ponies mouth the word at the same time, calling into question whether Derpy even spoke the audible line in the first place. Nevertheless, this is such a pervasive and universally accepted component of her fanon characterization that it got a nod from the production staff in "Putting Your Hoof Down," where Derpy's bag is seen with a muffin clip◊, and when a limited edition Derpy Hooves toy was released, the box art included muffins.
Hilariously subverted in the fanfic Address Unknown: Derpy tells Twilight that she hasn't been able to look at a muffin without wanting to throw up since the Baked Bads incident in "Applebuck Season".
Similar to the Derpy/Ditzy case above but at a smaller scale; Soarin the male member of the Wonderbolts that is often depicted alongside Spitfire has been flanderized by fanon to be obsessed with pie. This is mainly because his first scene in the series is of him purchasing and eating an apple pie. Though canon has not confirmed that pie is a favorite food of his, (it was never mentioned when he returned in the season 4 episode: "Rainbow Falls") an official series of MLP trading cards has a line about "ponies joking that his pie eating has set more records than his wings" in his card's description.
Big Good Princess Celestia seems to have a fondness for cake.
Ever since the Hub Network put this recipe set up on their website, fans have jumped on the idea that Princess Luna has a fondness for grilled cheese sandwiches. They are described as Glorious, after all. It figures the Princess of the Night would be fond of such a popular late-night snack.
On that note, has Applejack ever eaten anything other than an apple dish? Apple Fritters in particular seem to be a favorite.
Batman: The Animated Series: Killer Croc is fond of chicken (as shown in the episode "Life is a Croc"), thought he prefers it raw and can eat four or five whole ones in one sitting, each in one bite.
Jake the dog from Adventure Time loves spaghetti, even dreaming about having pillows full of the stuff.
As mentioned by the Ice King, Finn's favorite food is meatloaf.
The Emperor's New School has Kuzco's love for Mudkas Meat Mugs, to the point where he tried to eat nothing else in one episode, and Kronk's affinity for spinach puffs, which he is borderline obsessed with.
The Mayor in The Powerpuff Girls really likes pickles; he's rarely shown eating anything else. He often calls the Powerpuff Girls on their hotline to get help opening pickle jars.
He apparently likes bananas even more, however, because in one episode, a banana distracts him from Mojo Jojos "remote controlled pickle".
The Mayor's also gave away his position of mayor to Princess when she bribed him with a roomful of Turkish Delight. Keep in mind, he did this after turning down several attempts at large cash bribes.
Kick Buttowski seems particularly fond of Cheetah Chug (made with sweat from real cheetahs!) as do Gunther with anything lingonberry related.
In Foster's Home for Imaginary Friends, Eduardo has potatoes, which initially began as a joke (to explain why he had a handy potato sack) and became a running gag throughout the show. Later on and less frequently, Jackie Khones made it clear that he loves sandwiches, even going to court with Madame Foster over one.
Frankie and her grandmother's cookies, DEAR GOD. It's enough to turn her from a stable human being to a complete cookie addict.
Daria and Jane both really like pizza. Daria's family also eats frozen lasagna for dinner almost every night (but that just might be because Helen's too busy with work to cook an actual meal).
Daria has also on several occasions expressed a fondness for cheddar fries.
The threeshowsfollowingthe original Ben 10, the title character was shown to love chili fries and smoothies, the latter a case of irony as between the original series and Alien Force he refused to drink them.
In The Magic School Bus, Arnold and chocolate mallo-blasters. He has a lesser fondness for a Cheeto-expy and spent a month prior to the events of the cell-themed episode eating Sea Wheedies ( sea weed-covered carrot chunks) and NOTHING ELSE.
Muscle Man on Regular Show is a Big Eater in general, but seems to have a particular affinity for Wing Kingdom chicken wings. The entire cast also fell in love with The Best Burger In the World, a cheeseburger stuffed inside another cheeseburger with two deep fried cheeseburgers for buns, but its only served once every hundred years.
Tino, Lor, Carver, and Tish from The Weekenders really like junk food, especially chili cheese fries and Chug-A-Freezes.