Gummis (Japanese: グミ Gummi) are consumable items found in Pokémon Mystery Dungeon series. Gummis come in a variety of colors, and have varying effects based on where they are applied. In all instances, eating a Gummi will increase a Pokémon's IQ, allowing it to learn more IQ Skills, with better-tasting Gummis increasing the value by a greater amount.
In Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team, when a Gummi is eaten inside a Friend Area, one of the recipient's stats increases (or rarely, all stats). Inside a dungeon, eating a Gummi will fill one's Belly: 60 Belly if it matches Pokémon's type, 30 if it weakens it, 25 if it's neutral, 20 if it is resisted by, and 5 if it's ineffective on it. In case of a Pokémon with two types, the numbers are added (e.g. A Grass Gummi would refill 80 of Hoppip's Belly, as it matches its Grass-type and is resisted by its Flying-type). Gummis are found in dungeons and as mission rewards. The Stormy Sea contains every type of Gummi.
In Pokémon Mystery Dungeon: Explorers of Time and Explorers of Darkness, stat gains occur randomly when they are eaten in dungeons. Gummis also increase Belly size by 5 if eaten when full. The player is able to buy Gummis for 800 Poké. Wonder Gummis are never available for purchase, and Gold Gummis are rarely seen in shops. Most Gummis will be found in dungeons that match the type that likes the certain Gummi the most.
There are many varieties of Gummi; each individual color is best received by a particular type. In Explorers of Time/Darkness, the Gummis are exclusive by game and the Gummis that cannot be found in the game are only found in certain dungeons, Zero Isle North and in Monster Houses or Treasure Boxes.
In Pokémon Mystery Dungeon: Rescue Team DX, Gummis are reduced to two different types because IQ Skills have been replaced by rare qualities. Both types of Gummis raise one of the Pokémon's stats at random. Rainbow Gummis sometimes yield a rare quality, while DX Gummis always yield a rare quality. Gummis are eaten at rescue team camps.