Agatha

Agatha is a Poison-type specialist. She is the third member of the Kanto Elite Four.

As Kanto Elite Four Member
This E4 is a tough one. Do not bring any Normal or Fighting types. Do not bring any grass or fairy types. Rock types may be of use. Dark types will be of a lot of help. Psychic types will be of help only if you don't use them against Haunter or Gengar. It is recommended that all of your pokemon are at least lvl 60 before battling here.