flying and water
Electric types and Grass types.
Archie is ez if you have grass types or electric types.
rock ground flying grass
Electric-types only have one weakness and that's Ground-type. Any Pokemon can defeat Electric-types, but using a Ground-type will likely have a super effective, making the Pokemon faint quicker.
Types that will inflict minimal damage on Grass are: Water, Electric, Grass, and Ground.
beat chuck in cinnawood city gym have psychic,flying and electric types
Lance can be tough but if you have electric types, ice types and water types your in good shape as long as there in the level 70's or close to that.
Electric is weak against Ground-type attacks. (Super effective to Electric-type Pokemon) Electric, Steel, and Flying-types are not effective very well against Electric.
to beat phoebe you will need some bug types or dark types to beat glacia you need electric or grass to beat drake you need dragon or water and sydney fire and fight and last but not least steven the master of steel to beat him you will need fire and rock
In Diamond and Pearl, Palmer has Milotic, Rhyperior, Dragonite, Regigigas, Heatran and Cresselia, for Milotic you can use an Electric-type such as Pikachu, Electabuzz, Jolteon, Zapdos, Raikou and Ampharos can beat it, Grass-types such as Bulbasaur, Leafeon, Chikorita, Meganium and Skiploom and Water-types such as Squirtle and Totodile can beat Rhyperior, Ice-types and Dragon-types can beat Dragonite, Fighting-type Pokemon can beat Regigigas, Fighting, Ground and Water-types can bet Heatran and you can use Dark, Ghost and Bug-type Pokemon to beat Cresselia.
Fire-type moves are not very effective against Electric-type Pokemon because fire has no advantage over electricity. In battle, Electric-type moves are super effective against Water and Flying-type Pokemon, which gives Electric-types an advantage over Fire-types.
well first i would get the two main types to beat him 1 fire type 2 electric then just get some strong Pokemon that's what i did