Stats

Stats are a primary function of the game. Each stat is separated into different categories of Attack, Defense, Special Attack, Special Defense, Speed, and HP (Hit Points). Belly is also a stat exclusive to Pokémon Mystery Dungeon games. In PMU 5 and PMU 6, upon leveling up players would gain points that they could spend to increase stat values, but in PMU 7 stats became set off each Pokémon's base stat total for balancing purposes and accuracy to the games.

HP, Attack, Defense, Special Attack, Special Defense are normally defined by this formula:

$$Stat = (Base + 100) * (Level + 1) / 70 + 10$$

The current value of each of those stats for the active Pokémon can be seen in the team panel at the top of the game screen.

These six stats can have flat increases by items such as scarves, family items, and dusts and silks. Abilities (such as Flare Boost or Hustle) or other items such as Choice items or Pokémon-specific items will indirectly increase these stats; they will not be shown visually in the team panel but will be in effect all the same.

Attack
The Attack stat determines how much damage a Pokémon deals when using a physical move.

Defense
The Defense stat determines how much damage a Pokémon receives when it is hit with a physical move.

Special Attack
The Special Attack stat determines how much damage a Pokémon deals when using a special move.

Special Defense
The Special Defense stat determines how much damage a Pokémon receives when it is hit with a special move.

Speed
The Speed stat determines how quickly a Pokémon can recover from the cooldown of getting hit (known as "hitstun").

HP
Hit Points, or HP for short, determine how much damage a Pokémon can receive before fainting.

Evasion
Evasiveness affects the probability of dodging an opponent's move. A full list of Pokémon with access to evasion increases can be found here.

Accuracy
Accuracy affects the probability of hitting a target.

Movement Speed
Movement speed determines the quickness of a Pokémon's movement. Movement speed cannot be altered outside of None (dungeons) or No Death Penalty morals or arenas.

Attack Speed
Attack speed determines the quickness of a Pokémon's attacks, on top of the base cooldown of a move. A list of Pokémon with access to attack speed increases can be found here.

Belly
Belly is a stat that depletes over time for the active Pokémon, in dungeons only. Every 10 steps, 10 basic attacks, or 2 turns (use of a move or item) will deplete 1 Belly. The current amount of Belly can be seen in the 🇧🇹 menu. The base Belly size is 100, and it can be increased eating certain consumables while full, but some food items increase Belly size without it needing to be full. Each member of the team has an individual Belly stat.

Belly will display three messages in the Battle Log when it reaches 20, 10, and 0. When Belly is fully depleted, Pokémon will lose 5 HP every five steps until the Belly is above 0. Going from a dungeon floor to a set floor will reset Belly to full, including resetting any size increases. Most edible items will fill Belly by some amount, as well as all seeds, Berries and Gummis.

Some items affect Belly:
 * A Stamina Band will increase steps until Belly loss to 20
 * A Diet Ribbon will decrease steps until Belly loss to 5
 * A Tight Belt will cause it to not lower at all from moving
 * Leftovers will cause using turns to not lower it

Technicalities
The counter for usage of turns is shared by all Pokémon, rather than only counting turns used by the active one. Steps will also be counted even if outside of a dungeon. Meaning that for example, 7 steps can be taken before entering a dungeon, and when a dungeon is entered, 3 steps inside will lower Belly.

Temporary Changes
Using certain moves, items, or certain Abilities coming into effect can increase or decrease a stat (other than HP or Belly) for the duration a Pokémon is on a map/dungeon floor, or the duration the item is being held or kept in the bag. These modifications also won't be seen visually in the team panel. Temporary stat changes can be reset back to normal by some moves, or by stepping on a Wonder Tile.

Stat changes for stats other than movement and attack speed can go up to 10 stages, rather than 6 like in the main series. How many stages a stat was affected by a change can be told by the message in the Battle Log. While a stat can be lowered from its increases, a stat that's gone into the negatives from stat drops currently does not have an effect on move calculations.

! style="background-color:#"|Change ! style="background-color:#"|Text ! style="background-color:#"|Stages
 * - style="background-color:#"
 * Increase
 * [Pokémon]'s [stat] rose slightly.
 * rowspan=2|1 stage
 * - style="background-color:#"
 * Decrease
 * [Pokémon]'s [stat] fell slightly.
 * - style="background-color:#"
 * Increase
 * [Pokémon]'s [stat] rose sharply!
 * rowspan=2|2 stages
 * - style="background-color:#"
 * Decrease
 * [Pokémon]'s [stat] fell harshly!
 * - style="background-color:#"
 * Increase
 * [Pokémon]'s [stat] rose drastically!
 * rowspan=2|3+ stages
 * - style="background-color:#"
 * Decrease
 * [Pokémon]'s [stat] fell drastically!
 * - style="background-color:#"
 * Increase
 * [Pokémon]'s [stat] can't go higher!
 * rowspan=2|Max
 * - style="background-color:#"
 * Decrease
 * [Pokémon]'s [stat] can't go lower!
 * }

Movement speed can be altered by three stages. When increased, it affects speed when running with 🇧🇹. When decreased, the Pokémon can no longer run, or its walking speed becomes slower. Running at normal speed can be considered transitioning to +1 movement speed.

! style="background-color:#"|Text ! style="background-color:#"|Stage
 * - style="background-color:#"
 * [Pokémon] is at quarter speed!
 * Stage -3
 * - style="background-color:#"
 * [Pokémon] is at half speed!
 * Stage -2
 * - style="background-color:#"
 * [Pokémon] was slowed!
 * Stage -1
 * - style="background-color:#"
 * [Pokémon] is at normal speed!
 * Stage 0
 * - style="background-color:#"
 * N/A
 * Stage +1
 * - style="background-color:#"
 * [Pokémon] is at double speed!
 * Stage +2
 * - style="background-color:#"
 * [Pokémon] is at quadruple speed!
 * Stage +3
 * }

Attack speed does not have proper stages, and instead just gets boosted by a certain amount from Abilities or items that increase it.