Which typing has the most 4x weaknesses and which has the most 4x resistances?

Question

Eg rock and ground share weaknesses to water and grass and steel and flying share resistances to grass and bug

Answer 1

Most 4x weaknesses - tie between 8 type combos

Grass/Bug has 4x weaknesses to Fire and Flying.
Ice/Bug has 4x weaknesses to Fire and Rock.
Ice/Rock has 4x weaknesses to Fighting and Steel.
Ice/Steel has 4x weaknesses to Fire and Fighting.
Ground/Rock has 4x weaknesses to Grass and Water.
Psychic/Ghost has 4x weaknesses to Ghost and Dark.
Rock/Fire has 4x weaknesses to Water and Ground.
Rock/Steel has 4x weaknesses to Fighting and Ground.

Most 4x resistances

Fire/Steel has a 4x resistance to Grass, Ice, Bug, Steel, and Fairy.

Source

Hope I helped!

Comments

Useless fact: ice, bug, steel, and fairy are the only 4 types that only Shedinja is immune to.

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Heatran the OP.

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Good thing they didn't ask for triple types. ;)

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Back under the original RBY type chart, Grass/Bug also suffered this ignominy against Poison, making it the only dual-type combo that's ever had three distinct double weaknesses at any point in time.

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Thanks now do triple types...jk