Notes on potential groupings, based off unused Legendary type combinations

Single types:

1. Fighting
2. Bug
3. Ghost
4. Dragon

Flying subtyping:

1. Normal/Flying
2. Bug/Flying
3. Water/Flying

Poison subtyping:

1. Grass/Poison
2. Bug/Poison
3. Water/Poison

Water subtyping:

1. Rock/Water
2. Water/Ice
3. Water/Psychic

Ground subtyping:

1. Rock/Ground
2. Water/Ground
3. Ground/Ghost

Dark subtyping:

1. Poison/Dark
2. Ground/Dark
3. Dark/Normal
4. Dark/Steel

Bug typing:

1. Bug/Grass
2. Bug/Rock
3. Bug/Water
4. Bug/Electric

Steel subtyping:

1. Steel/Ground
2. Steel/Ghost
3. Steel/Electric

Flying subtyping 2:

1. Rock/Flying
2. Poison/Flying
3. Ghost/Flying

Dark subtyping 2:

1. Grass/Dark
2. Dark/Fighting
3. Fire/Dark

Fairy subtyping:

1. Normal/Fairy
2. Bug/Fairy
3. Fairy/Flying

Grass subtyping:

1. Water/Grass
2. Rock/Grass
3. Grass/Dragon
4. Grass/Ice

Ground subtyping:

1. Ground/Ice
2. Ground/Psychic
3. Ground/Poison

Ghost subtyping:

1. Ghost/Poison
2. Ghost/Dark
3. Water/Ghost

Rock subtyping:

1. Rock/Psychic
2. Rock/Dragon
3. Rock/Ice

Fire subtyping:

1. Poison/Fire
2. Fire/Normal
3. Bug/Fire

Normal subtyping:

1. Normal/Grass
2. Electric/Normal
3. Normal/Dragon

Dragon subtyping:

1. Dragon/Fighting
2. Dragon/Poison
3. Dragon/Fairy

Ice subtyping:

1. Ice/Psychic
2. Ice/Steel
3. Dark/Ice

Ice subtyping 2:

1. Ice/Fairy
2. Ice/Electric
3. Ice/Ghost

Electric subtyping:

1. Electric/Water
2. Rock/Electric
3. Electric/Psychic

Others.

1. Rock/Dark
2. Fighting/Ice
3. etc.