In Pokémon Mystery Dungeon there used to be something called Gummis which would increase your IQ and Pokémon would have IQ Skills. IQ Skills help you throughout the dungeon—skills like Self-Curer (recovers from status effects faster), Trap Avoider (Pokémon avoids visible traps), and Nonsleeper (Pokémon resists sleep moves and traps). These Gummis would also raise your stats depending on the color of the Gummi. Mystery Dungeon DX has gotten rid of the IQ skills and has now replaced them with Rare Qualities.
Rare Qualities are additional abilities your Pokémon gains based on the Gummi and Pokémon. They are similar to IQ Skills as they are passive skills that will help you in a dungeon. A list of Rare Qualities is below!
Rare Qualities List
| Name | Effect |
| Bargain | Items can be bought at a lower price from shops |
| Blast Control | Damage your team takes from explosions is reduced |
| Brawl | The more enemies there are in a room, the more powerful your moves will be |
| Defensive Rhythm | Whenever your Pokémon are hit by attacks, their Defense and Sp. Def are boosted, making it easier to dodge attacks. 1 turn only |
| Evasive Rhythm | Whenever Pokémon are hit by attacks, their evasiveness is boosted, making it easier to dodge attacks. 1 turn only |
| Food Finder | More likely to find Tiny Apples in dungeons |
| Forge A Path | You can break through walls as you walk. But your Belly gets significantly emptier if you break walls |
| Friendly | Pokémon you battle against are more likely to become your friends |
| Funnel Fun | The rate at which HP restores naturally in a corridor is greatly sped up |
| Leap Ahead | The Pokémon behind you in a corridor jumps in front and uses a 1-tile move. After it uses the move, that pokémon returns to its original spot |
| Leave Half | An Apple, Max Ether, or Tiny Reviver Seed will remain in your bag after you use a Big Apple, Perfect Apple, Max Elixir, or Reviver Seed. |
| Link Boost | The power of linked moves is boosted. The more that are linked the more powerful they become |
| Lonely Courage | When a Pokémon has no nearby teammates, it gets very strong |
| Mind Over Matter | When a Pokémon steps on a Wonder Tile, its strength is restored, its bad conditions such as being poisoned or burned also heal. |
| Moving Up | Move Exp earned when you use moves in a dungeon is increased more than usual |
| Narrow Focus | Moves used in a corridor will never miss |
| Notorious Fasting | Pokémon won’t take damage even when their Belly reaches 0. Beware that HP won’t restore naturally while the Pokémon’s Belly is empty |
| Notorious Healing | The rate at which HP restores naturally is sped up |
| Notorious Restoration | When you use items that restore HP or fill your Belly, those items will restore more than usual |
| PP Pouch | The PP of a learned move restores a bit when an enemy is defeated |
| Rapid Bull’s-Eyes | Moves that hit multiple times will never miss |
| Recoil Boost | Moves that have recoil damage or moves that hurt the user if they miss are greatly powered up |
| Riled Up | Attack and SP.Atk are boosted when you take damage from an enemy |
| Sales Pitch | Items can be sold at a higher price to shops in dungeons |
| Shared Happiness | When a teammate’s bad conditions are healed, a bad condition of another team member also gets healed |
| Small Stomach | Whatever food you eat, it will fill your Belly completely |
| Squad Up | The more members you have on your team, the more likely it is that Pokémon you battle against will want to be your friends |
| Squeeze Out | The PP of a move that has 0 PP may sometimes be restored |
| Steamroll | Even moves that have no effect or are not very effective due to Abilities or bad type matchups will be able to steamroll opponents and deal damage |
| Strike Back | When the Pokémon takes damage from an adjacent enemy, it reduces the Attack and Sp.Atk of that enemy |
| Thrown Item Boost | Spikes and stones are powered up. On top of that, enemies won’t be able to catch items |
| Tight Formation | The more team members there are nearby, the lower the damage will be when Pokémon are hit by wide-ranging moves, such as Magnitude |
| Wary Walk | When a Pokémon steps on a trap, the trap may be broken and disabled |
| XP Boost | The EXP points Pokémon earn after defeating an enemy in a dungeon are boosted |
If any Pokémon on your squad has a Rare Quality then the effect will be granted for your entire team. For example if your Pikachu has XP Boost, then your partner and other Pokémon you bring will also benefit from that XP Boost. Unlikely to be stackable, but haven’t been confirmed yet.
*Note, these passive abilities only work inside a dungeon. So, Bargain for example only applies to dungeon shops.
How to get Rare Qualities
Rare Qualities can be obtained from Rainbow Gummi and DX Gummi. There is also a chance of befriending a Pokémon with a Rare Quality if you use a Rare Quality Orb. This will only last on the floor you used it on.
Rainbow Gummi’s raises one if your stats permanently and sometimes will unlock a Rare Quality. Eat them at the rescue camp.
DX Gummi’s gives you a 100% chance of obtaining a Rare Quality and raises one of your stats permanently. Eat them at the rescue camp.
Best Rare Qualities
These are what I believe to be the best Rare Qualities in the game.
Friendly – this Rare Quality allows you to recruit more Pokémon that you face in a dungeon! I remember days where I spent hours on a dungeon map trying to befriend a Pokémon I really wanted. This will speed up the process greatly!
XP Boost – Leveling up faster is always a good thing because with levels you get stronger and unlock more moves.
PP Pouch – One of the most frustrating things when running a dungeon is running out of PP for a move. This will cause you to retreat most of the time when you want to complete the entire dungeon. Also it’s super frustrating when you run out of the Super Effective move you need to help clear the Boss fights. So this will be a Rare Quality I will look to put on my team.
Small Stomach – Another frustrating thing about mystery dungeons is the Hunger factor. Having to carry so much food is super annoying when you’re trying to really explore the dungeon completely or trying to befriend other Pokémon. Having this Rare Quality will allow you to carry less food and you’ll have space in your bag for other nice items.