Notes on type combinations by abundance, SuMo

1. Normal: Normal is the most abundant type, counting at 65 Pokémon. It contains four legendaries, Regigigas, Arceus, Type: Null, Silvally.
2. Water: Water is the second most abundant type, counting at 62 Pokémon. It contains four legendaries, Suicune, Kyogre, Phione and Manaphy.
3. Grass: Grass is the third most common type, counting at 38 Pokémon. It has one Legendary, Shaymin. .
4. Psychic: Psychic is the fourth most common type, counting at 35 Pokémon. It contains 10 legendaries, Mew, Mewtwo, Deoxys, Uxie, Mesprit, Azelf, Cresselia, Cosmog, Cosmoem, Necrozma.
5. Fire: Fire is the fifth most common type, counting at 31 Pokémon. It contains 1 legendary Pokémon, Entei.
6. Electric: Electric is sixth most common type, counting at 27 Pokémon. It contains 2 legendaries, Raikou and Xurkitree. In Gen 6, it had no new members.
7. Normal/Flying: Normal/Flying is the seventh most common type, counting at 26 Pokémon. It has no legendaries.
8. Fighting: Fighting is the eighth common type, counting at 22 Pokémon. It has no legendaries.
9. Bug: Bug is ninth common type, counting at 18 Pokémon.It has no legendaries.
10. Fairy: Fairy is tenth common type, counting at 16 Pokémon. It has one Legendary, Xerneas, and in Gens 3, 4 and 5 it has no representatives.

Fifteen only:

1. Poison: Poison is eleventh common type, counting at 15 Pokémon. It has no Legendary, and in Gens 2, 4, 6 and 7 it has no representatives.
2. Ground: Ground is eleventh common type, counting at 15 Pokémon. It has one Legendary, Groudon, and in Gen 6 it has no representatives.

Fourteen only:

1. Bug/Flying: Bug/Flying is thirteenth common type, counting at 14 Pokémon. It has no legendaries, and in Gens 5 and 7 it has no representatives.
2. Grass/Poison: Thirteenth common type, counting at 14 Pokémon. It has no legendaries. In Gens 2, 6 and 7 it has no representatives.
3. Ice: Thirteenth common type, counting at 14 Pokémon. It has one Legendary, Regice. In Gens 1 and 2,  it has no representatives(Alolan Vulpix can be counted for Gen 1, however).

Twelve only:

1. Bug/Poison: Sixteenth common type, counting at 12 Pokémon. It has no Legendary.
2. Dragon: Sixteenth common type, counting at 12 Pokémon. It has no Legendary.

Eleven only:

1. Rock: Eighteenth common type, counting at 11 Pokémon. It has one Legendary, Regirock.
2. Dark: Eighteenth common type, counting at 11 Pokémon. It has one Legendary, Darkrai.

Ten only:

1. Rock/Water: Twentieth common type, counting at 10 Pokémon. It has no Legendary.

Nine only:

1. Rock/Ground: Twenty first common type, counting at 9 Pokémon. It has no Legendary.
2. Ghost: Twenty first common type, counting at 9 Pokémon. It has no Legendary.
3. Ground/Water: Twenty first common type, counting at 9 Pokémon. It has no Legendary.

Seven only:

1. Steel/Psychic: Twenty fourth common type, counting at 7 Pokémon. It has two Legendaries, Solgaleo and Jirachi.
2. Water/Flying: Twenty fourth common type, counting at 7 Pokémon. It has no Legendary.
3. Grass/Flying: Twenty fourth common type, counting at 7 Pokémon. It has one Legendary, Shaymin Sky Forme.
4. Psychic/Flying: Twenty fourth common type, counting at 7 Pokémon. It has one Legendary, Lugia.

Six only:

1. Ground/Dragon: Twenty eight common type, counting at 6 Pokémon. It has one Legendary, Zygarde.
2. Rock/Steel: Twenty eight common type, counting at 6 Pokémon, It has no Legendary.
3. Bug/Steel: Twenty eight common type, counting at 6 Pokémon. It has one Legendary, Genesect.
4. Bug/Grass: Twenty eight common type, counting at 6 Pokémon. It has no Legendary.
5. Ghost/Grass: Twenty eight common type, counting at 6 Pokémon. It has no Legendary.
6. Fire/Fighting: Twenty eight common type, counting at 6 Pokémon. It has no Legendary.
7. Fire/Flying: Twenty eight common type, counting at 6 Pokémon. It has two Legendaries, Moltres, and Ho-Oh.
8. Water/Poison: Twenty eight common type, counting at 6 Pokémon. It has no Legendary.
9. Water/Ice: Twenty eight common type, counting at 6 Pokémon. It has no Legendary.
10. Psychic/Fairy: Twenty eight common type, counting at 6 Pokémon. It has one Legendary, Tapu Lele.
11. Dragon/Flying: Twenty eight common type, counting at 6 Pokémon, It has one Legendary, Rayquaza.

Five only:

1. Normal/Fairy: Thirty ninth common type, counting at 5 Pokémon. It has no Legendary.
2. Poison/Dark: Thirty ninth common type, counting at 5 Pokémon. It has no Legendary.
3. Bug/Rock: Thirty ninth common type, counting at 5 Pokémon. It has no Legendary.
4. Bug/Water: Thirty ninth common type, counting at 5 Pokémon. It has no Legendary.
5. Steel: Thirty ninth common type, counting at 5 Pokémon. It has one Legendary, Registeel.
6. Water/Psychic: Thirty ninth common type, counting at 5 Pokémon. It has no Legendary.
7. Water/Dark: Thirty ninth common type, counting at 5 Pokémon. It has no Legendary.
8. Grass/Fairy: Thirty ninth common type, counting at 5 Pokémon. It has one Legendary, Tapu Bulu.
9. Electric/Flying: Thirty ninth common type, counting at 5 Pokémon. It has two Legendaries, Zapdos, Thundurus.
10. Dark/Flying: Thirty ninth common type, counting at 5 Pokémon. It has one Legendary, Yveltal.

Four only:

1. Normal/Fighting: Forty ninth common type, counting at 4 Pokémon. It has one Legendary, Meloetta Pirouette Forme.
2. Psychic/Fighting: Forty ninth common type, counting at 4 Pokémon. It has one Legendary, Mega Mewtwo X.
3. Ground/Ghost: Forty ninth common type, counting at 4 Pokémon. It has no Legendary.
4. Rock/Flying: Forty ninth common type, counting at 4 Pokémon. It has no Legendary.
5. Bug/Electric: Forty ninth common type, counting at 4 Pokémon. It has no Legendary.
6. Ghost/Fire: Forty ninth common type, counting at 4 Pokémon. It has no Legendary.
7. Steel/Ground: Forty ninth common type, counting at 4 Pokémon. It has no Legendary.
8. Water/Fairy: Forty ninth common type, counting at 4 Pokémon. It has one Legendary, Tapu Fini.
9. Electric/Steel: Forty ninth common type, counting at 4 Pokémon. It has no Legendary.
10. Dark/Dragon: Forty ninth common type, counting at 4 Pokémon. It has one Legendary, Guzzlord.

Three only:

1. Normal/Psychic: It has one Legendary, Meloetta Aria Forme.
2. Poison/Flying: It has one family, Zubat-line.
3. Ground/Flying: It has one Legendary, Landorus.
4. Ground/Dark: It has one family, Sandile-line.
5. Rock/Electric: It has one family, Alolan Geodude-line.
6. Bug/Fighting: It has two Legendaries, Buzzwole and Pheromosa.
7. Ghost/Flying: It has no Legendaries.
8. Ghost/Poison: It has one family, Gastly-line.
9. Steel/Ghost: It has one family, Honedge-line.
10. Steel/Fairy: It has one Legendary, Magearna.
11. Fire/Ground: It has one Legendary, Primal Groudon.
12. Fire/Psychic: It has one Legendary, Victini.
13. Water/Grass: It has one family, Lotad-line.
14. Water/Electric: It has no Legendaries.
15. Grass/Fighting: It has one Legendary, Virizion.
16. Grass/Steel: It has one Legendary, Kartana.
17. Grass/Psychic: It has one Legendary, Celebi.
18. Grass/Dark: It has no Legendary.
19. Ground/Ice: It has one family, Swinub-line.
20. Dragon/Fire: It has one Legendary, Reshiram.
21. Dark/Fighting: It has no Legendary.
22. Dark/Fire: It has no Legendary.
23. Dark/Psychic: It has one Legendary, Hoopa Unbound.

Two only:

1. Normal/Grass: It has no Legendary.
2. Fighting/Steel: It has one Legendary, Cobalion.
3. Poison/Fighting: It has one family, Croagunk-line.
4. Poison/Ground: It has one group, Nidorans.
5. Poison/Fire: It has one family, Salandit-line.
6. Ground/Psychic: It has one family, Baltoy-line.
7. Rock/Grass: It has one family, Lileep-line.
8. Rock/Psychic: It has one group, Lunatone/Solrock.
9. Rock/Ice: It has one family, Amaura-line.
10. Rock/Dragon: It has one family, Tyrunt-line.
11. Rock/Fairy: It has one Legendary, Diancie.
12. Bug/Ground: It has no Legendary.
13. Bug/Fire: It has one family, Larvesta-line.
14. Bug/Fairy: It has one family, Cutiefly-line.
15. Steel/Flying: It has one Legendary, Celesteela.
16. Fire/Normal: It has one family, Litleo-line.
17. Water/Fighting: It has one Legendary, Keldeo.
18. Water/Ghost: It has one family, Frillish-line.
19. Water/Dragon: It has one Legendary, Palkia.
20. Grass/Ice: It has one family, Snover-line.
21. Grass/Dragon: It has no Legendary.
22. Electric/Normal: It has one family, Helioptile-line.
23. Electric/Fairy: It has one Legendary, Tapu Koko.
24. Psychic/Ghost: It has two Legendaries, Hoopa and Lunala.
25. Ice/Flying: It has one Legendary, Articuno.
26. Ice/Steel: It has one family, Alolan Sandslash-line.
27. Ice/Psychic: It has one family, Smoochum-line.
28. Dragon/Fighting: It has one family, Jangmo-o-line.
29. Dragon/Electric: It has one Legendary, Zekrom.
30. Dragon/Psychic: It has two Legendaries, Latias and Latios.
31. Dark/Normal: It has one family, Alolan Rattata-line.
32. Dark/Ghost: It has no Legendaries.
33. Dark/Steel: It has one family, Pawniard-line.
34. Dark/Ice: It has one family, Sneasel-line.
35. Fairy/Flying: It has one family, Togepi-line.

One only:

1. Normal/Ground:
2. Normal/Water:
3. Normal/Dragon:
4. Fighting/Flying:
5. Fighting/Ghost: It has one Legendary, Marshadow.
6. Fighting/Ice:
7. Flying: It has one Legendary, Tornadus.
8. Poison/Dragon:
9. Ground/Electric:
10. Rock/Fighting: It has one Legendary, Terrakion.
11. Rock/Poison: It has one Legendary, Nihilego.
12. Rock/Dark:
13. Bug/Ghost:
14. Ghost/Dragon: It has one Legendary, Giratina.
15. Ghost/Fairy:
16. Steel/Dragon: It has one Legendary, Dialga.
17. Fire/Rock
18. Fire/Steel: It has one Legendary, Heatran.
19. Fire/Water: It has one Legendary, Volcanion.
20. Water/Steel:
21. Grass/Ground:
22. Electric/Ghost:
23. Electric/Fire:
24. Electric/Grass:
25. Electric/Psychic:
26. Electric/Ice:
27. Ice/Ghost:
28. Ice/Fairy:
29. Ice/Dragon: It has one Legendary, Kyurem.
30. Dragon/Fairy: