Of the 136 type pairs that Pokémon species hold, 44 belong to a single evolution line. Twenty-one of them belong to one lone Pokémon, like Tyranitar (Rock/Dark) or Volcanion (Fire/Water).
Here we use one rule. A pair is unique when only one evolution line holds it among species, and the order of the two types does not matter. So Ghost/Water and Water/Ghost are the same pair. Alternate forms such as Mega Evolutions and regional forms are handled in their own section.
How common each pair is
Counting evolution lines, not Pokémon, the 136 pairs fall like this:
- 44 are held by exactly one line.
- 38 are held by two lines.
- 47 are held by three to five lines.
- 7 are held by six or more.
The most shared pair is Normal/Flying, held by 14 lines. Flying/Bug follows with 10, then Water/Rock with 7. Of the 44 unique pairs, 36 belong to ordinary lines and 8 belong only to Legendary, Mythical, Ultra Beast or Paradox Pokémon.
Every one of the 44 has its own page on the site, so each pair below links to its dual-type weakness page.
The unique pairs by generation
The Pokémon column shows every species that holds the pair, which is more than one for a line. A pair is placed in the generation where its first holder appeared.
Generation 1 (1 pair)
| Type pair | Pokémon | Species |
|---|---|---|
| Poison/Flying | Zubat, Golbat, Crobat | 3 |
Generation 2 (3 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Water/Electric | Chinchou, Lanturn | 2 |
| Ice/Ground | Swinub, Piloswine, Mamoswine | 3 |
| Rock/Dark | Tyranitar | 1 |
Generation 3 (6 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Water/Grass | Lotad, Lombre, Ludicolo | 3 |
| Ground/Bug | Nincada | 1 |
| Bug/Ghost | Shedinja | 1 |
| Fire/Ground | Numel, Camerupt | 2 |
| Ground/Psychic | Baltoy, Claydol | 2 |
| Grass/Rock | Lileep, Cradily | 2 |
Generation 4 (7 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Water/Steel | Empoleon | 1 |
| Normal/Water | Bibarel | 1 |
| Flying/Ghost | Drifloon, Drifblim | 2 |
| Grass/Ice | Snover, Abomasnow | 2 |
| Ice/Ghost | Froslass | 1 |
| Electric/Ghost | Rotom | 1 |
| Fire/Steel | Heatran | 1 |
Generation 5 (2 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Dark/Steel | Pawniard, Bisharp, Kingambit | 3 |
| Fighting/Rock | Terrakion | 1 |
Generation 6 (6 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Normal/Fire | Litleo, Pyroar | 2 |
| Psychic/Dark | Inkay, Malamar | 2 |
| Normal/Electric | Helioptile, Heliolisk | 2 |
| Rock/Dragon | Tyrunt, Tyrantrum | 2 |
| Ice/Rock | Amaura, Aurorus | 2 |
| Fire/Water | Volcanion | 1 |
Generation 7 (3 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Ice/Fighting | Crabominable | 1 |
| Bug/Fairy | Cutiefly, Ribombee | 2 |
| Normal/Fighting | Stufful, Bewear | 2 |
Generation 8 (7 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Grass/Dragon | Applin, Flapple, Appletun, Dipplin, Hydrapple | 5 |
| Electric/Poison | Toxel, Toxtricity | 2 |
| Dark/Fairy | Impidimp, Morgrem, Grimmsnarl | 3 |
| Normal/Dark | Obstagoon | 1 |
| Ice/Bug | Snom, Frosmoth | 2 |
| Electric/Dark | Morpeko | 1 |
| Electric/Ice | Arctozolt | 1 |
Generation 9 (9 pairs)
| Type pair | Pokémon | Species |
|---|---|---|
| Bug/Dark | Lokix | 1 |
| Normal/Poison | Shroodle, Grafaiai | 2 |
| Fire/Grass | Scovillain | 1 |
| Poison/Steel | Varoom, Revavroom | 2 |
| Fighting/Ground | Great Tusk | 1 |
| Electric/Rock | Iron Thorns | 1 |
| Fighting/Fairy | Iron Valiant | 1 |
| Poison/Psychic | Munkidori | 1 |
| Poison/Fairy | Fezandipiti | 1 |
Generation 9 adds the most, 9, and Generation 1 the fewest, with only Poison/Flying for the Zubat line. The single-species entries include the Paradox Pokémon Great Tusk, Iron Thorns and Iron Valiant, and Munkidori and Fezandipiti. Pokémon Database confirms the types of Tyranitar, Empoleon and Bibarel, which are three of the single-species pairs.
Pairs that look unique but are not
Some pairs people call one-offs are not in the list. Frillish, Jellicent and Basculegion share Water/Ghost across two lines. Marshadow shares Fighting/Ghost with Annihilape. Pokémon Database lists Marshadow as Fighting/Ghost and Jellicent as Water/Ghost.
Unique pairs and their weaknesses
A unique pair can be a tough one to defend with. Amaura and Aurorus hold Ice/Rock, which takes 4× damage from both Fighting and Steel. Snover and Abomasnow hold Grass/Ice, which takes 4× from Fire. Snom and Frosmoth hold Ice/Bug, and Pokémon Database shows 4× weaknesses on Frosmoth as well. The dual-type pages list every matchup.
Forms change the answer
Species typings are one thing. Alternate forms can add a type pair that a species never has, or hand a species pair to a second line.
Eight pairs are held only by forms, and by no regular species:
- Electric/Psychic: Alolan Raichu
- Ice/Steel: Alolan Sandshrew, Alolan Sandslash
- Ice/Fairy: Alolan Ninetales
- Electric/Grass: Hisuian Voltorb, Hisuian Electrode, Mow Rotom
- Dragon/Fairy: Mega Altaria
- Fire/Electric: Heat Rotom
- Fire/Ice: Zen Galarian Darmanitan
- Normal/Ghost: Hisuian Zorua, Hisuian Zoroark
Seventeen of the 44 unique pairs also appear on a form from a different line. Wash Rotom is Electric/Water like Chinchou, the Wellspring Mask Ogerpon is Grass/Water like Lotad, Alolan Geodude is Electric/Rock like Iron Thorns, and Mega Lopunny is Normal/Fighting like Stufful. These pairs are unique among species but not once forms are counted.
What about pairs nobody has
Of the 153 possible pairs of two different types, nine have no Pokémon at all, according to Pokémon Database. The type combinations that don't exist article lists them. Fire/Fairy and Bug/Dragon are two. For matchups, dual-type weaknesses explained shows how to read any pair, and Pokémon with 4× weaknesses covers the extreme ones.