I would use Bastiodon and spam Rockslide or Ancient Power
You use it to evolve a Pokemon like murkrow into honchcrow.OR A MISDREAVUS INTO MISMAGIUS!
the best Pokemon to use against electric Pokemon is ground/rock Pokemon.
The Pokemon that can evolve once you use a Dusk Stone on it are Doublade, Misdreavus, Lampent and Murkrow.
The Pokemon that use a dusk stone to evolve are Murkrow and Misdreavus.
Ground types are best against electric types.
if you have Groudon and it has fissure use him..
Murkrow to Honchkrow Mismagius to Misdreavus Lampent to Chandelure
You use a dusk stone on a Murkrow or Misdreavus to evolve to a Mismagius
it would be best to use ghost Pokemon against the gym leader
Use dusk stone on murcrow and then evolve
The best Pokemon to use against Crasher Wake is any Electric type. It's recommended to have a Grass type as backup and to help deal with his Quagsire who is four times weak against Grass.
catch a murkrow make sure it stays at level 17 or 18 and only use the move astonish because none of mewtwo's moves will work on murkrow