Another food bowl shamelessly wolfed down by Tubbs.
Ace Combat 7 has the character known as "AWACS Long Caster". On some missions, he makes some food related metaphors, in addition to his official description stating that he brings food onboard his AWACS plane to eat while he fulfills the role of Mission Control for Cyclops and Strider squadrons. Justified with the following quote:
AWACS Long Caster: Sorry, but I'm gonna eat while I work. My judgement goes fuzzy when I'm too hungry.
MakotoNanaya is heavily implied, if not outright stated, to be this. Her introduction in BlazBlue is at Litchi's clinic, having injured herself by falling out of a tree she was climbing for exercise and fun (yeah, she's like that) after eating several platefuls at an all-you-can-eat buffet with her friends Noel and Tsubaki. She's often shown eating snacks and sweets, and one of her winquotes is:
That brings us to Platinum the Trinity, whose intro to the story involves her eating several dish stacks' worth of food like a total glutton - she even does this in Arcade mode, too! Truly, Ragna is cursed - Platinum was the second to dine-and-dash on him, the first being Taokaka. A gag reel from Chronophantasma Extend has Luna offer to take Tao to mooch off of Ragna after both are rejected from Amane's troupe.
Possibly even funnier in the original Japanese/DS retranslation, where that "soup" is booze.
Also recall, this was a drinking contest against Ayla, so she's in here, too, though in her case her appetite probably feeds her prodigious strength.
Papa from Cooking Mama. A salary man with an average build, his main characteristic is he loves eating good food. This is more of a plot point in the apps, however.
Jones in Criminal Case seems borderline obsessed with food, especially things like hot dogs and cookies. Other characters lampshade this with comments such as "do you ever think of anything other than eating?"
In Dragon Age: Inquisition, Sera once ate a positively huge meal, much to her dining partner Blackwall's astonishment. He has no idea where it all goes. In another conversation, Sera explains that she eats like this because she knows what it's like to be truly hungry thanks to growing up in poverty.
Android 21 from Dragon Ball FighterZ constantly has a desire to eat as many treats as she want to. On one hand, it's treated as a Horror Hunger as her evil side created clones of several characters, and resurrected several villains with the intent of devouring them all. But on a much lighter note, 21's good half likes eating sweets without having to resort to eating people. She even mentions how Bulma let her try string cheese for the first time, and ended up eating at least a hundred of them because she loved the taste.
Tiki the Fairy from Dragon's Crown is at least implied to be this; though a petite, slender fairy girl who is small enough to fit into a standard sized tavern goblet, she's implied to have single-handedly devoured the enough-for-a-party-of-six spread of food at the player characters' table.
The playable characters are definitely this, if the campfire minigame is any indication: with the possible exception of the stout Dwarf, most of the characters have either slim or muscular builds and can snarf down incredible amounts Sauteed Demon's Heart, Killer Rabbit Stew, and Red Dragon Steaks. The Fighter even proudly declares, "I'm gonna have nineths!"
Fang from Fairy Fencer F. The very first scene you see upon hitting "New Game", after the obligatory backstory about the battle between the Goddess and Vile God, is him being rescued from jail after he stole food. And even then, it takes Eryn a lot of convincing to get him out, because Fang doesn't mind staying in jail forever if it means getting free food and rest. Then, when he does escape and is told to use magic to attack the guards, he instead tries to magically conjure up some food. And when he is told to Fairize, he instead yells "Fairice" and thinks that it's a kind of fried rice. The entire reason he pulled out the Fury containing Eryn, starting the plot of the game, is because he thought it would let him wish for some food.
In Fantasia - Momento of Grand Finale, Nero is a carnivore who eats a lot (mostly inedible). It is even played for laughs most of the time and he claims it to be his magical ability as a half-elf to have an iron stomach.
Sabin from Final Fantasy VI. He isn't even afraid to stop and eat a several course meal of ghost food on the Phantom Train, knowing full well that he is being prematurely taken to the other side.
Prishe from Final Fantasy XI frequently uses food items to boost her stats during battle, and will ask her teammates for food items if she's one of your opponents in the "Heroine's Combat" event. In addition, she has a whole list of secret food-related quotes in the Dissidia: Final Fantasy prequel. Apparently, being a Cute Bruiser burns up calories like whoa.
The Cavalier Lowen, Marcus' right hand in FireEmblem 7. A Justified Trope because he's actually the cook of the party (mentioned in his supports), and he was raised by his father and grandfather, both former cooks for the Pherae royalty.
Syrene: You know I can tell when you're lying. Plus, you not eating is a dead giveaway. I mean, when's the last time you said no to a cookie? It's not a criticism. One of your most charming qualities is how you can outeat anyone. It's because of someone special, isn't it?
There's also the thundermage Ilyana from Fire Emblem Tellius. To start, every support conversation she has involves her being hungry. She joins your party in the 10th game at first to avenge her stomach for being fed scraps that could never satisfy her. However, at her first introduction in the 9th game, the hero assumes she's just ill. Also, other characters accuse her of using her really cute looks to get free food. Taking this trope to the extreme, Ilyana even complains that she's dying with an empty stomach when she is killed in battle (in a game where non-plot critical characters such as herself die for real). One popular fan theory is that she has a tapeworm. Her character specific ending in Radiant Dawn states that "somewhere, she is hungry." Even more so, one of her support conversations has her so hungry that she starts chomping on Mia's boots, much to poor Mia's horror.
A possible explanation is that Ilyana might be a Branded from the Laguz tribe. One of the supposed hints is that the Laguz have quite large appetites, just like she does. (The other is that she has uncommonly big Physical Strength growths for a mage, again like the Laguz do).
Ike himself is no slouch in the eating department, having an appetite that's said to rival that of any beast laguz. Especially when it comes to meat.
Stahl in Fire Emblem Awakening is described as "the biggest glutton in the army", and is perpetually hungry. In the "Golden Gaffe" DLC, he tells the first Risen he meets that he was saving gold for a large meal. He says that his dream is to go Walking the Earth... and taste all the local dishes he can find. (And if he marries Cherche, he is said to have put on weight after eating all her excellent cooking.)
Panne is said to be "the one who wolfs down any food faster in the army" and the aforementioned Stahl can gain her affections via cooking for her. It's kind of a Justified Trope: she's a member of the Taguel race, and her powers involve shapeshifting into a LARGE fighting bunny with a very physical fighting style.
Nah is said to be one of these too, likely because she's a Half-Human Hybridand a growing teenager on top of that.
Effie from Fire Emblem Fates might top everyone here. She's the one who "has most second helpings" according to her profile, mentions food in almost every single support chain, a Running Gag has her taking someone else's food, etc. A sketch by the game's character designer has her happily eating mountains of plates, to both the frustration of her partner Arthur and the horror of the cooks around them.
Princess Sakura has, in her own words, next to no self-control when it comes to eating, specially sweets. In her supports with Hayato, she eats many dango sticks almost per reflex, and is reluctant to participate in the Beach Brawl battles until she learns that the prize includes a vacation to an island with lots of delicious fruits.
Li Xiangfei. Two of her endings show her getting her teammates and friends in trouble for her appetite and several of her winning quotes involve her mentioning food. Her family has a restaurant in South Town, yeah, but oh booooy...
The psychic Sie Kensou is such a big eater that he actually uses eating niku-man dumplings as a special fighting technique that lets him recover health during battles... as long as he doesn't choke on them, that is.
Maxima is this and has a massive Sweet Tooth. A Justified Trope since he must eat sweets constantly due to being a Technopath and a cyborg - glucose is the fuel for the brains, and Maxima's still human brain must handle and process LOTS of data all the time.
In the XIV game, the Canon Immigrant Muimui also loves pork buns. In fact, she and Kensou have a special intro in which they both discuss the merits of their respective worlds' buns, with Kensou even promising her that he'll take her to a place that serves some really good ones.
In another BioWare one - Zaalbar from Knights of the Old Republic. Mission snarks that he needs "eight squares a day." In his first in-game appearance, he is annoyed with having to back up Mission against a pair of Rodians because "Mission, they just brought my food!" And, when enslaved for maybe a day, became so hungry he bit a hunk out of one of his captor's arms. He is also the party member that approaches you when someone other than him is getting into the emergency rations. Justified in that Zaalbar appears to be the Wookiee equivalent of a BIG teenaged boy.
Pit in Kid Icarus: Uprising has a big appetite, which is lampshaded by Palutena and Viridi on multiple occasions, particularly in regard to his penchant for eating food right off of the floor. The anime short Palutena's Revolting Dinner also shows him having more of a taste for junk food than vegetables. This is all later referenced in Super Smash Bros. for Wii U during a few Palutena's Guidance taunts.
In a third BioWare game, Mass Effect, the Codex reveals that people with biotic abilities (telekinesis) are big eaters since it takes so much energy to use their powers. In order to stay healthy, they need to take in almost three times as many calories as a normal person in their position, and they usually take special high energy drinks or bars right after every battle in which they use their power.
Sonia Strumm and Bud Bison, as noted by Geo Stelar, Luna Platz and Zack Temple.
Speaking of Luna, fail to grab her handkerchief in the third game (you have to choose between it, Sonia's fan-gift bag, and Bud's shirt) and watch her gorge on "comfort food". Sonia has the same reaction if you don't pick her hand-bag, and both will pig-out if you save Bud's shirt.
Also Netto/Lan from Mega Man Battle Network. On one occasion in the anime, he gorges on curry until he balloons up cartoonishly, though a couple scenes later he turns back to his usual skinny self.
Bud encounters a little girl named Fay Phamish in 2 who is able to keep up with him in an eating contest. Given that Bud had a four-armed robotic hat stuffing burgers into his mouth throughout that competition, this is more impressive than it sounds.
Naked Snake of Metal Gear Solid 3: Snake Eater would probably qualify for this, as would EVA when you have to escort her. Polishing off two sets of rations (engineered to keep you going for at least a day) in a minute and walking away no less hungry than before? Yeah. The only thing he's interested in during ParaMedic's nature lessons, is whether he can eat the item in question. Add to that the Boss's comment at the beginning of the game about him having lost weight. Suggests his love of food is a little more that just necessary stamina recovery. In Portable Ops, he complains about Sigint's idea to make eating unnecessary for soldiers, because eating is the highlight of his day.
Interestingly done in Metal Slug. Eat too much food and your soldier becomes fat (Uh-oh, BIG!), which slows them down, but increases the power of their weapons. This trope was the reason as to why Nadia joined the team in Metal Slug 4: so she could lose the weight and go into the modeling business. Also featured in the "Good" ending of Metal Slug 4 as well.
Your average Monster Hunter character can gobble down a comically oversized hunk of meat in about five seconds, and a full meal in roughly the same time. Then there are the armor abilities Speed Eating (Consume meat/healing items faster) and Double Hunger (Lose stamina quickly).
Then there is the Deviljho who is known for wiping out all known local fauna within an area with its ravenous hunger.
The main character of Persona 3. On one of the dates with Elizabeth, in which the two of them go to all of the strip mall's restaurants, she asks him afterwards if he was alright, as he had "eaten little after our seventh meal". In the Moon social link, the Gourmet King comments on how the main character can eat so much and still stay thin. The main character is also portrayed this way in the manga◊.
The female main character in Persona 3 Portable also qualifies; as Junpei will point out during his Social Links, she orders just as much as he does and has no trouble with it.
In Persona Q, Rei is almost always eating and/or talking about food, and has a seemingly unlimited appetite. Her particular favorite is corn dogs, which she can seemingly make appear out of nowhere.
In Persona 5, the entire team is shown to have pretty big appetites; Ryuji and the protagonist regularly get into eating contests with each other, and Ann has a massive Sweet Tooth despite being a part-time model. Yusuke plays this differently, since he often gets excited at the mere mention of food due to his previous guardian Madarame having literally kept him in a perpetual state of starvation.
Alex Mercer from [PROTOTYPE] is one hungry Humanitarian, devouring people and other Infected monsters with equal abandon. Instead of becoming visibly fatter, his shapeshifting powers allow him to compress his mass down to normal human size, which is handy given that he's implied to weigh at least a ton.
This obscure children's educational game called "Pumkin Land" ("pumpkin" is intentionally misspelled) featured a mini-game that is intended to teach children about different foods. The player plays as a diner worker and has to serve an anthropomorphic pumpkin who eats enough food to feed many people in one sitting. Not only does he eat a massive amount of food but he also eats condiments and cooking ingredients on their own (salt, pepper, jam, and butter) and if he orders a beverage or something that's served in a container, bowl, cup, or shaker; he will eat that with the food!
In Punch-Out!! for the Wii, Piston Hondo is shown eating several times his own weight in sushi as part of his Title Defense training.
In Pokémon Sun and Moon, you are. The protagonist trainer can grab up to 50 servings of food at the Battle Buffet, Buffetnote You're given 10 turns to grab as much as you can, meaning you can grab 10 entrees if you manage all OHKOs, and the maximum each entree can have is five servings., and scarfs down all of it after doing so. (Oh, and there's nothing keeping you from going to Mallow's restaurant right after that.)
Batsu Ichimonji and Hinata Wakaba from Rival Schools (though the latter does this only with cake).
In Street Fighter V, Laura Matsuda likes to eat as much as Birdie, despite being thin as a rail. After beating him in story mode, both are seen chowing on barbecue with equal enthusiasm.
Rosita Aries, the Token Mini-Moe in Sakura Wars: So Long, My Love. The first thing she does when she joins the New York Combat Revue is demand food, threatening to eat her pet ferret if she doesn't get any soon. She actually has a Freudian Excuse for her obsession with food, since she once was extremely poor.
Hilda's combat abilities in Shadow Hearts 3 actually justify her eating habits — she casts from calories. And if her calories get high enough, she ends up both "curvy" (read: ridiculously round) and barely recognizable.
Xiba from SoulCalibur loves food, with most of his lines revolving around it.
The hidden collectibles for 100% Completion in 'Splosion Man are wedding-sized cakes, which the character proceeds to nom in a single cram (witha slice or two comically bouncing away). Given that he's a being of living fire, he's not going to worry about weight. He also tends to mention various types of meat while doing things. of course, given that slain characters in this game "bleed" meat...
Yoh from Starry☆Sky has a very low tolerance of hunger, and is often vocal about it.
Reid from Tales of Eternia, who states outright several times that he is 'not interested in anything that doesn't fill his stomach', and who is constantly hungry and in search of things to eat. Furthermore, the sole reason he has become proficient in using a sword is so that he can hunt for food in the forests. In the crossover game Tales of the World: Radiant Mythology, there occurs a memorable (and hilarious) scene involving Reid practically molesting Senel (from Tales of Legendia) over a basket of bread that Senel happens to be carrying.
Aside from constantly referencing food in the 8th game, if you take the translations literally, she actually eats a boss during the course of the game, merely complaining of a small bone afterward. Kindasorta justified in that she's a ghost. But only partially. The boss she "ate" made a full recovery in time for the 9th game.
As of Ten Desires, we now have Yoshika Miyako, whose ability is to "eat anything and everything".
Tsukumogami has Saki, a tiny, cute, hyperactive girl who works as the poster-girl at the local We Sell Everything shop - being apparently paid entirely in food, which tends to evaporate around her. However, she's actually a Weasel-spirit in human form, which might explain some of it. Her siblings - talking weasels who lack the spiritual power to change shape - are just as bad, and appear capable of putting away ludicrous amounts of food considering their tiny bodies.
Queen Memory in Twinkle Star Sprites, who is perpetually hungry and (in her ending scene) asks the wish-granting Twinkle Star for an enormous amount of food (plus sherbet for dessert). It's suggested her daughter Ran might be the same way.
Cecilia from Wild AR Ms and Lilka from Wild AR Ms 2 are both Big Eaters in the magic user category, although it's only used for a single gag in each game.
Jin from Yo-Jin-Bo isn't shown to eat a lot on screen, but he's the only one to ever complain of being hungry, and when he does, the other guys groan as if that's all he ever talks about.
It's standard for Castlevania heroes to regain health by eating whole turkeys, pot roasts, etc, but Castlevania: Order of Ecclesia takes the practice up a notch by actually making it into a subplot. Shanoa can buy food from the town chef, Aeon, whose cooking is so awful that nobody else will go near it. It would seem like Aeon's kitchen is doomed, but Shanoa eats so much that she's able to single-handedly keep him in business while she's around. One of the dishes he can serve her is a grilled fish about the size of a small car, and at high levels it can take three or four of those in a row to fill Shanoa's health bar all the way.
Killia of Disgaea 5 is known to eat before a battle, occasionally delving into Food Porn where he describes the meals in question. It helps distract him from his personal doubts and keeps his repressed inner hatred at bay, but it's only a stopgap, as Chapter 12 sees him eating ever increasing portions, up to and including whole dragons.
Shadowrun Returns Hong Kong: Whenever you see Gobbet, she's eating. If she isn't eating, she's planning her next meal. Being a street kid turned Rat shaman, it makes sense that she wouldn't turn down food, but she will also lambast the PC for eating another character's food without permission, and her final Relationship Upgrade involves her giving you a standing dinner invitation. Food is very clearly important to Gobbet. Oh, and Gobbet is an Ork, but still taller and lankier than most elves.
Manpukumaru Chang of Valkyrie Drive -Bhikkhuni- spends all of her waking time gorging herself full at the school's cafeteria and her life goal is to become a food reporter. She even manages to make this trope a part of her combat style by being able to eat meat buns in the middle of combat to recover health.
Albert of Revenant Saga normally requires about ten times the amount of food a man can eat, mainly due to him housing the soul of a demon in his body.
An unusual Cool Big Sis example is Deis in Breath of Fire IV. Admittedly, she had the perfectly valid excuse of being imprisoned in a suit of armour named Ershin (that grew to have a mind of its own) for centuries; the first thing she does when she ends up being hosted in the body of a summoner (after complaining about the summoner's figure) is pigging out until she passed out.
This is a gameplay mechanic for the player in Crush, Crumble, and Chomp! Failure to eat regularly makes the monster hungry; if the monster becomes ravenous, the player loses control and the computer takes over.
Forrest Kaysen in D4. He regularly eats enough food for five people. His culinary feats include eating five steaks on top of each other, five slices of pizza at once, several gallons of chowder, and a pint glass full of oysters and lemon juice.
Alistair from Dragon Age: Origins notes that Wardens tend to become this, especially in the period shortly after their Joining.
Rico in Duel Savior Destiny has an apparently bottomless stomach and is capable of eating a pile of food larger than herself without any ill effect. This makes somewhat more sense when you realize she's barely even a corporeal being let alone human.
Implied with Youtia in Eien no Aselia, who forces Yuuto to make her lunch. He makes enough for at least four people figuring he can serve the rest to everyone else later, but she eats it all before being satisfied. Considering her personality, though, she might not have eaten in days.
Given that the bosses in Evil Twin: Cyprien's Chronicles are dark reflections of the hero's friends, the fat kid Joey's counterpart Big Joe takes this trope to its extreme: an immobile, enormously fat creature with two mouths who rules over an island mostly made out of food which exists for no other reason than to feed its ruler. The good Joey is imprisoned in Big Joe's stomach.
The Qus of Final Fantasy IX have huge appetites and a culture that revolves entirely around food. The playable Qu, Quina, even has the ability to eat monsters if they're sufficiently weakened, which is how s/he learns Blue Magic. (Though s/he will not eat humans or most bosses.) There is also a mini-game that involves Quina catching and eating frogs.
Big Smoke in Grand Theft Auto: San Andreas not only orders enough food for all four people in the car when the player takes CJ's friends to the drive through on a mission, but he actually manages to eat everyone's meals in the few minutes it takes to finish the car chase immediately after.
Kurumi Kasugaoka, from the sadly canceled Nintendo DS dating sim Hachikoi. Her character page on the website even allows you to feed her!
Coach is implied to be a big eater in Left 4 Dead 2, but it's never shown since the zombie outbreak kind of ruined his chances of resting so he can eat something big. He likes eating a pizza sub style, possibly having a sweet tooth since he says it's a damn shame the rainstorm in Hard Rain washed all the sugar away, and heavily likes the Burger Tank's BBQ bacon cheeseburger with fries, orange soda with no ice, and an apple pie. When the survivors see a wedding in the park during The Parish, Coach may sometimes ask if the others have seen a wedding cake around.
Manpuku in Ōkamiden. He saves Chibiterasu (who he nicknames Pork Chop) from being cooked in a huge pot of soup... by drinking the soup. It's also deconstructed, his compulsive eating means his mother can't afford to feed his dog, so he gave him to a relative. There's rarely any food in his house because he eats it all, and his mother skips meals often.
Misaki Kawana from ONE. This is referenced in Eternal Fighter Zero with her "High-Speed Lunch" super.
Hanako from Persona 4, also a Gonk that believes she's gorgeous. When she's on a diet, she eats a bucket of curry.
King Hippo. His intro in the Wii game shows him in a field full of ham and tropical fruit; over three cutaways, he eats everything there.
Bear Hugger of the same series drinks gallon jugs of maple syrup at every meal. He's also fat enough that you can't hurt him by hitting his stomach.
Drang the ogre in Puzzle Quest has five missions where he asks you to procure rare, dangerous monsters for him to eat. One of them, a Wyvern, is requested so that it can kill a Troll he ate that's regenerating in his gut. The fourth one is an ogre, which disgusts your character. When you finish the last mission, Drang joins your party and takes bites out of any Animal-type enemy you face, causing them opening damage.
Gan Isurugi from Rival Schools. Justified as he's built almost like a Sumo fighter and his fighting style is heavily based on Sumo itself.
The de Sainte-Coquille family, who are almost universally large with appetites to match. Max of Rune Factory 2 is still slim, but when Barret makes a cameo in Rune Factory 4, he wonders if Max will one day resemble the rest of his family.
The Street Fighter V version of Birdie is made into this. Not only can he eat various foods to boost his V-Gauge as well as to toss out for certain attacks, but his win animation has him munch on two donuts before pulling a giant one out of nowhere.
The Heavy from Team Fortress 2. He sure does love those sandwviches. He can even earn an achievement for eating 100 Sandviches, which he does with great gusto, one after another. Well, he certainly needs all those carbs to lug around his 150-kilogram minigun, and his belly roll makes for great recoil cushioning.
Barlow of Vanguard Bandits, the ATAC pilot with what he calls a "glandular disorder". He's always eating some candy, and when he gets hungry he starts going after the weirdest things. Ranging from earth-worms to platypi.
The pandaren in World of Warcraft: Mists of Pandaria are an entire race of Big Eaters. In part because of that, most pandaren consider being fat a virtue, and some will even say that your character could stand to gain a few pounds. (Indeed, fat pandaren seem to be barely slowed down by their extra weight.)
Tubbs in Neko Atsume. Whereas other cats will take a few bites from the food bowls and then play with one of the toys, the fluffy, chubby Tubbs will simply devour the entire bowl and then lounge next to it to digest their meal.
The Covetous Demon from Dark Souls IIWas Once a Man who fell in love but was rejected, and expressed his despair through eating. Eventually, his gluttony transformed him into a ravenous monstrosity. During the fight, it is possible to release Undead Laborers into the boss chamber, which will promptly cause the Demon to ignore the player in favor of devouring its next meal.
In Paladins, Moji's familiar, Po-Li, is a large two-headed lizard with an endless hunger for treats. While Moji will gladly turn enemies into treats for Po-Li, she constantly has to keep them from eating everything in sight.
Big Pete, a quest NPC from TerraTech, does almost nothing but eat resource chunks. A strange case, since it's unclear whether Big Pete is a fat, jolly yellow robot or a normal person inside it.
In Sly Cooper there's Murray who eats quite a bit even in meetings when Bentley plans a mission!
Storo, the muscle of the Squeak Squad is probably also a big eater considering his size. Though, the only place he really shows it off is in one of the mini-games in Kirby: Squeak Squad where he and Kirby have a quick draw cake eating contest.
Little Nightmares: The Guests are all enormously fat, and board the Maw to enjoy the massive amount of food cooked by the Chefs. They will also attempt to eat Six if they see her. Interestingly enough, Six is also this, eating everything from a loaf of bread to raw meat to a (proportionally) dog sized rat to a friendly Nome and eventually, a big chunk of the Lady's flesh over the short course of the game.
Also in HG/SS, School Kid Billy says that Jasmine is a big eater when he tells you that she hangs out at the Olivine Cafe on Wednesdays. If you actually go there on Wednesdays between one PM and two PM, you can find her there, and the rumor is clearly true; she has a LOT of empty plates on her table. (Incidentally, this is how you can get her phone number, something that is needed from a Gym Leader if you want to battle him or her at the Saffron City dojo.)
Munchlax (it's actually known as the Big Eater Pokémon) and its evolution, the most famous Pokémon Big Eater ever, Snorlax, big, fat, always hungry when awake, and capable of devouring whole forests of fruit in less than a day. It will devour its entire body weight in food at least once a month and it weighs over 1,000 pounds.
Downplayed with Larvitar, a Pokémon that eats rocks and stones. According to its Pokedex entry, when preparing to evolve it will eat an entire mountain before turning into the immobile Pupitar.
Another Pokémon family, Gulpin and Swalot, they are living stomachs with expandable mouths that swallow their food whole.
And fifth gen brings us the Deino family. Deino itself is blind and instinctively takes bites out of anything it bumps into (which is everything). It evolves into Zweilous, a Multiple Head Case that fights with itself over food and more often than not ends up eating twice as much. Zweilous eventually gains eyes when it evolves into Hydreigon, an aggressive predator, wild Hydreigon are said to kill and eat anything they see.
Pokémon Sun and Moon Introduced Guzzlord. Its Sun Pokédex entry states that it's been seen to gobble up mountains and buildings, and its Moon entry describes it as eating constantly.
Downplayed in the Pokémon-amie with some species of Pokémon. No matter how big or small a Pokémon is, it takes the same number of Poké-puffs to satisfy it. Consequently, you can see shades of this trope with smaller species who can eat multiple Poké-puffs that appear bigger than they are.
Yoshi, of course! In every game where he appears, he can swallow enemies (most of them) and depending on the game, make use of what he eats, gaining powers in some cases, spitting them at other enemies in other cases, or in still other cases using them to produce eggs to use as projectiles.
Mario himself really likes-a his pasta. Also, seafood in Super Mario Sunshine.
It is made more evident in the cartoons though, then we find out that his much thinner brother Luigi can put on food even more than he does...
Aldrich, Devourer of Gods from Dark Souls III. Presumably, he started with normal food, then graduated to cannibalism after a prophetic dream and acquiring the powers of The Deep. Eventually, even that wasn't enough for him and he took to devouring the gods themselves. When you finally reach him, he's been reduced to a sentient pool of rotten flesh that uses the long dead upper torso of Dark Moon Gwyndolin from the first game as his weapon.
THE iDOLM@STER: Cinderella Girls introduced Kanako Mimura, who is actually kinda fat and has to watch her weight. The problem is she loves making and eating sweets.
THE iDOLM@STER: Million Live! introduces Nao Yokoyama, who, like Takane, shows no sign of getting fat, despite being constantly shown with food in her cards. She also constantly mentions being hungry. Kana Yabuki might also count as she loves sweets (like Haruka) and, in the movie, overeats out of depression and becomes fat too. However, after the other idols help her get over her depression, she gets back to her normal weight.
Finally, THE iDOLM@STER: SideM introduces Tsubasa Kashiwagi, who not only eats a lot without getting fat, but in one episode of the anime, he claims to have lost his appetite while still eating a lot.
In the StreetPass Mii Plaza minigame Feed Mii, the meals you make for the adventuring Miis are very large relative to the Miis you're feeding, especially Jumbo-class meals, yet those Miis happily chow down on those dishes with no effects to their bodies, regardless of what their owners set their body shapes to.