Pokémon Gold and Silver/Indigo Plateau

Here, your journey will be half way over, the Pokémon League Elite Four awaits, it is recommended that first, you get some powerful Pokémon on your team (>lvl. 50) then go in.

You may also want some items, the Center is also a Mart and the person with the will teleport you back to New Bark Town.

Reccomended Pokémon
It is recommended to have at one of these:
 * Ice type Pokémon (with a water move)
 * Dewgong w/ Surf, Whirpool or Waterfall
 * Cloyster w/ Clamp, Surf or Whirlpool
 * Lapras w/ Water Gun, Hydro Pump, Surf or Whirlpool
 * Sneasel w/ Surf
 * Electric type Pokémon
 * Fire type Pokémon
 * Rock type Pokémon
 * Fighting type Pokémon
 * Psychic type Pokémon

Will



 * Moves: Quick Attack, Future Sight, Psychic, Confuse Ray Use your Ice/Electric/Dark Pokémon
 * Moves: Psychic, Egg Bomb, Leech Seed, Reflect Use your Fire/Flying Pokémon
 * Moves: Psychic, Body Slam, Curse, Amnesia Use your Electric/Grass Pokémon
 * Moves: Ice Punch, Double Slap, Psychic, Loverly Kiss Use your Fire Pokémon
 * Moves: Psychic, Quick Attack, Future Sight, Confuse Ray Use your Ice/Electric/Dark Pokémon

Afterwards, heal up, and reorganise your Pokémon so that you have your Psychic Pokémon leading

Koga



 * Moves: Spider Web, Double Team, Baton Pass, Giga Drain Use your Psychic Pokémon
 * Moves: Spikes, Swift, Protect, Explosion Use your Fire Pokémon
 * Moves: Sludge Bomb, Minimize, Toxic, Acid Armour Use your Psychic Pokémon
 * Moves: Gust, Supersonic, Toxic, Psychic Use your Psychic Pokémon
 * Moves: Wing Attack, Double Team, Toxic Use your Psychic Pokémon

Afterwards, be sure to lead with a Psychic type

Bruno



 * Moves: Quick Attack, Dig, Detect, Pursuit Use your Psychic Pokémon
 * Moves: Ice Punch, Fire Punch, Thunder Punch, Mach Punch Use your Psychic Pokémon
 * Moves: Double Kick, Foresight, Hi Jump Kick, Swagger Use your Psychic Pokémon
 * Moves: Rock Slide, Sandstorm, Earthquake, Bind Use your Ice Pokémon's Water Move
 * Moves: Rock Slide, Foresight, Cross Chop, Vital Throw Use your Psychic Pokémon

Once beaten, be sure to place a fighting-type as your lead.

Karen



 * Moves: Faint Attack, Confuse Ray, Mean Look, Sand Attack Use your Fighting Pokémon
 * Moves: Stun Spore, Acid, Petal Dance, Moonlight Use your Fire Pokémon
 * Moves: Faint Attack, Whirlwind, Pursuit, Quick Attack Use your Ice Pokémon
 * Moves: Lick, Spite, Curse, Destiny Bond Use your Psychic Pokémon
 * Moves: Crunch, Flame Thrower, Roar, Pursuit Use your Rock Pokémon

Once finished, place an electric into the lead because Lance's first Pokémon is a gyarados.

Champion Lance



 * Moves: Rain Dance, Surf, Flail, Hyper Beam Use your Electric Pokémon
 * Moves; Twister, Thunderwave, Hyper Beam, Blizzard Use your Ice Pokémon
 * Moves: Flame Thrower, Slash, Wing Attack, Hyper Beam Use your Rock Pokémon
 * Moves: Rock Slide, Ancient Power, Wing Attack, Hyper Beam Use your Ice or Rock Pokémon, doesn't matter which
 * Moves: Twister, Thunderwave, Thunder, Hyper Beam Use your Ice Pokémon
 * Moves: Safegaurd, Outrage, Fire Blast, Hyper Beam Use your Ice Pokémon

After defeating the Elite Four and Lance, the end credits roll. However, your journey is not over yet, you still have 8 more badges to get...