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What is the most broken type and why is it Fairy?
>one immunity
>resistances to two of the best attacking types along with one other
>only weak to two types both of which are bad attacking types outside of STAB
>resisted by three types, each of which are weak to EQ
>nothing that it is completely ineffective against
Literally can be put as a secondary type on to any single-typed Pokemon and it improve the Pokemon, without even adding in Fairy typed moves to it. Don't believe me? Look at the weaknesses/resistances of a single type, say, Fire or Normal. Now make it Fire/Fairy or Normal/Fairy.