Mampfaxo

Diamond: It wolfs down its weight in food once a day, swallowing food whole with almost no chewing.

Pearl +2: It hides food under its long body hair. However, it forgets it has hidden the food.

Platinum +4: In its desperation to gulp down food, it forgets about the food it has hidden under its fur.

HeartGold +3: It conceals food under the long fur on its body. It carts around this food stash and swallows it without chewing.

Sun: It needs to consume its own weight in food every day. As far as flavor is concerned, it’s indifferent.

Moon: When it finds something that looks like it might be edible, it goes right ahead and swallows it whole. That’s why it gets fatter day by day.

Ultra Sun: It hides food under its long fur, but it sometimes forgets about it and causes a stinky disturbance.

Ultra Moon: Anything that looks edible, Munchlax will go on and swallow whole. Its stomach is tough enough to handle it even if the food has gone rotten.

Sword: Stuffing itself with vast amounts of food is its only concern. Whether the food is rotten or fresh, yummy or tasteless—it does not care.

Shield: It stores food beneath its fur. It might share just one bite, but only if it really trusts you.

Legends: Arceus: Its robust stomach allows it to nonchalantly devour even rotted matter. It pays frequent visits to villages, seeking out food scraps intended for compost.