Dark, ghost and bug. But be careful, as Phycic Pokemon can hit ghost Pokemon hard as well. Dark types don't get affected by phycic attacks, but, although there are no dark-types around, use dark type moves like bite and crunch.
It is weak against Dark type Pokemon
Dark type are very strong to physic pokemon. Grass,fire and water are weak(not very strong).
Koga, the Fuchsia City gym leader, is a Poison Type Pokemon trainer. Go into battle with ground and psychic type Pokemon. The Pokemon he uses are 2 Koffing, one Muk and one Weezing. Bring a Diglet/Dugtrio, an Abra (Kadabra/Alakazam), Drowzee and a Chansey if you can get one (Chansey is a super strong Pokemon that can learn TM Physic).
Grass type Pokemon are strong against Water, Ground and Rock.
Bug-type Pokemon are strong against Grass, Fighting, and Ground-type moves.
If you have any friends with ruby, sapphire or emerald or firered or leafgreen have them trade you really strong Pokemon then beat the elite four like that.
you should use water types because they are strong against fire types
strong electric, fighting, rock, or steel for the first one, strong psychic or flying for the second one, strong ghost or dark for the third one, and strong ice or dragon for the fourth one
blastoise lv60up,zapdos 1st 2nd,3rd blastoise dig bite,4th zapdos and articuno,champion the rest of your strong Pokemon
Dark type are very strong to physic pokemon. Grass,fire and water are weak(not very strong).
The strongest wild pokemon can be found in either Cerulean Cave or Seven Island.
it depends on what lvl how strong your Pokemon are!! plus who there facing
The pokemon that are strong against psychic are bug, dark, and ghost.
You can find pretty strong ones in cerulean cave.
Koga, the Fuchsia City gym leader, is a Poison Type Pokemon trainer. Go into battle with ground and psychic type Pokemon. The Pokemon he uses are 2 Koffing, one Muk and one Weezing. Bring a Diglet/Dugtrio, an Abra (Kadabra/Alakazam), Drowzee and a Chansey if you can get one (Chansey is a super strong Pokemon that can learn TM Physic).
Grass type Pokemon are strong against Water, Ground and Rock.
Go to 7 Island, there are a whole lot of strong Pokemon there.
well if you have a exp. share use it on weak Pokemon and on a x-tream strong Pokemon and get big levels