Flab Zone

Area map

Flab Zone
Flab Zone.png
First appearance	Mario & Luigi: Bowser's Inside Story (2009)
Latest appearance	Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey (2018)
Greater location	Bowser's body
Inhabitants	Tenderlings, Calorites, Kretins, Nutsoglobins, Princess Lipid

The Flab Zone is an area in Bowser's body where Mario and Luigi go to find the princess in Mario & Luigi: Bowser's Inside Story. This area can only be explored when Bowser is fat due to being tricked into eating excessive amounts of high-fat content food made by Fawful following Bowser's fight with Midbus. Here, Mario and Luigi encounter many new enemies. Through a few rooms, they find Princess Peach being held by several Kretins. Mario and Luigi watch in horror as they carry her away. Luigi runs after, but stops on a Donut Block and falls into mucus. A white figure named Princess Lipid drags Luigi up and gives the Bros badges. They proceed through several rooms with Save Blocks and blocks containing Attack Pieces, including vortex-like objects only to be used by a Spin Jump. After learning how to do Spin Jumping, and to use the Jump Helmet, Mario and Luigi find the Kretins with Peach. Mario quickly brushes them off with his spin jump. Once the princess is conscious, however, the Kretins form together to make the Alpha Kretin. After defeating the Kretins, Mario, Luigi, Peach, and Starlow proceed into two more rooms; in the second one, Peach is abducted by Fawful.

Though the Flab Zone cannot be accessed while Bowser is skinny, the player can go back to this area whenever they desire once Bowser learns the body slam and has access to his castle. Bowser can return to the feast room and eat to regain the weight for the bros to return to the Flab Zone, and this time, he can quickly exercise to get rid of the fat and move again.

On their way, Mario and Luigi will often encounter two pipes where only one is the right path; the other connects backwards and if the two mistakenly enter it, they will lose their progress. Nutsoglobins are found in this area and provide information on which pipe the Mario Bros. should take.

Later on in the game, Bowser can revisit the banquet room and eat leftovers, though this time, he instantaneously gets fattened with one piece of food, allowing access to this area again. When the player switches back to Bowser, he quickly burns off the fat to get moving again.

Enemies encountered

• Tenderlings
• Calorites
• Kretins
  • Alpha Kretin (boss)
  • Beta Kretins (boss)

Items found

The entrance to the secret room, found in the room where Mario and Luigi learn the Spin Jump move.

The following are overworld items found in the Flab Zone in Mario & Luigi: Bowser's Inside Story.

Item	Icon	Location
Super Mushroom		In a ? Block in the second scene.
		In a ? Block in the upper scene after the first fork.
		x2 In a ? Block in the first scene after the maze.
1-Up Mushroom		In a ? Block in the middle scene after the third fork.
Super Nut		In ? Blocks in the middle scene after the second fork.
Ultra Nut		In the secret room that can be accessed with the hidden blocks (see right)
Syrup Jar		In a ? Block in the lowermost scene after the second fork.
Supersyrup Jar		In a ? Block in the lower scene after the first fork.
		In a ? Block in the uppermost scene after the third fork.
		In a ? Block in the first scene after the maze.
Retry Clock		In a ? Block in the first scene.
Attack Piece		#1 In the attack piece block in the second scene.
		#2–5 In a ? Block in the upper scene after the first fork.
		#6–9 In a ? Block in the lowermost scene after the third fork.
		#10 In an attack piece block in the scene with vomit.
EXP Socks		In the secret room that can be accessed with the hidden blocks (see right)
POW Boots		In ? Blocks in the middle scene after the second fork.
Good Badge		Given by Princess Lipid.
Mushroom Badge		Given by Princess Lipid.

Names in other languages

Click an area to open the relevant article.

Language	Name	Meaning	Notes
Japanese	メタボルスペース[?] Metaboru Supēsu	「メタボル」is possibly a shortening for「メタボリズム」(metaborizumu, metabolism) or from「メタボ」(metabo, metabolic syndrome and also slang for "overweight"), and「スペース」means "space"
German	Speckkammer[?]	Flab Chamber
Italian	Centro Metabolico[?]	Metabolic Center
Spanish (NOA)	Depósito de Lípidos[?]	Lipid Deposit
Spanish (NOE)	Sala Grasosa[?]	Fat Room