Weak Armor according to type distribution

Rock:

1. Roggenrola
2. Boldore
3. Onix
4. Omanyte
5. Omastar
6. Kabuto
7. Kabutops
8. Magcargo
9. Dwebble
10. Crustle

Poison:

1. Garbodor

Dark:

1. Vullaby
2. Mandibuzz

Flying:

1. Skarmory
2. Vullaby
3. Mandibuzz

Ground:

1. Onix

Ice:

1. Vanillite
2. Vanillish
3. Vanilluxe

Steel:

1. Skarmory

Fire:

1. Slugma
2. Magcargo

Water:

1. Omanyte
2. Omastar
3. Kabuto
4. Kabutops

Bug:

1. Dwebble
2. Crustle

Ghost:

1. Galarian Corsola
2. Cursola
3. Sinistea
4. Polteageist

Edit (01.01.2020): Added Sword and Shield additions.