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>johto only has 2 ghost types
>makes a ghost type gym leader with only gastly line
>this is fine
>hoenn only has 2 ice types
>makes an ice type elite four with only sealeo, glalie and walrein
>this is fine
>DP only has 2 fire types
>makes a fire type elite four with different types, sunny day and fire-type moves
>this is NOT fine