Aim for at least level 65 just to be safe. You can use one of your extra party slots (you will have 1-3, depending on whether you use a Water/Ice dual Pokémon and include the Bug/Ghost Pokémon) to take a lower-leveled Pokémon up and give it the Exp Share. It will be easier if you have a full team consisting of all of the above plus a strong defender (a Dratini evolved into Dragonite works best since their only weaknesses are Ice and Dragon-type moves, while they resist Fire, Water, Electric, and Grass).

Inside Indigo Plateau you’ll find areas for you to heal your Pokémon and stock up on supplies. Save your game before continuing to the Elite Four.

You could use Zapdos and Moltres with Thunderbolt, Shockwave, and Flamethrower for this fight. If you have a Dark Pokémon on your team, it will do well against Jynx. [3] X Research source When you’ve defeated Lorelei, a door opens that you can go through to find Bruno. You’ll want to save your game before continuing.

Avoid using Flying-type Pokémon as Hitmonchan and Machamp can use Rock Tomb. Slowbro is really strong here. Not only does it have higher-than-average defense stats (compared to other Psychic types), but it’s also a Water-type, which gives it an edge against Bruno’s 2 Onyx. You’ll want to save your game before continuing.

Normal and Fighting-type Pokémon are useless in this fight as most of Agatha’s Pokémon will be immune. Save your game before continuing.

Once Gyarados is down, switch to your Ice-type Pokémon to take out his two Dragonair and Dragonite with Ice Beam or Blizzard. He then has Aerodactyl, which is a dual Rock/Flying Pokémon. You can use Surf to weaken Aerodactyl. Zapdos and Articuno are the best Pokémon for this fight. [4] X Research source Save your game before continuing.

He will use an Alakazam third, which is a Psychic-type Pokémon and is best handled with Earthquake. [5] X Research source After you defeat the Champion, Professor Oak will come to congratulate you, then take you to the Hall of Fame, where you will get the title, “League Champion. "