Your first port of call should be the Game Freak offices, located west from the Dimensional Research Lab in Heahea City. Specifically, you’ll need to head to the middle floor of the office building. There, if you’re confident in your skills, chat to the Veteran towards the left side to begin a very special battle.
GAME FREAK Morimoto and Iwao
This is a Double Battle against Morimoto, the battle planner, and Iwao, the game’s director. No pressure! Morimoto’s first Pokémon, Gengar, has excellent Special Attack and Speed. It can use Shadow Ball and Sludge Bomb for STAB, and Dark Pulse to try and cause flinch. Ground or Dark-types are recommended.
Next can be Machamp, which boasts high Attack, but has low Speed. Its No Guard Ability makes it so that its attacks never miss–and neither will attacks used against it. For attacks, it has Dynamic Punch for STAB and confusion, Stone Edge to counter Flying-types and Poison Jab to slay Fairies. Psychic-types are ideal.
Finally, Morimoto’s Dragonite has stellar Attack and generally great stats. It can use Draco Meteor and Hurricane for STAB–the former greatly reduces its damage output afterwards. It also has Blizzard and Thunder to hit common Types. Ice or Fairy-types are ideal, but be wary of Multiscale weakening the first hit.
Meanwhile, Iwao’s first Pokémon, Kecleon, has good Attack and special bulk, but tragic Speed. Its Protean Ability changes its Type to match the attack it last used. It can use Shadow Claw, Brick Break, Rock Slide and Sucker Punch. Hit it with a fast physical attacker before it changes Type, disrupting your plans.
Ambipom has reasonable Attack and Speed, but low-ish bulk. Iwao’s can use Double Hit for STAB, Aerial Ace to hurt Fighting-types, U-Turn to switch out, and Dual Chop to take a pot shot at Dragons. Unless they’re fast or bulky, Fighting-types should be very cautious. Rock or Steel-types might be the best choice here.
Iwao’s final Pokémon, Blissey, is a humongous special tank and not much else. It can use Dazzling Gleam to counter Fighting-types, and Fire Blast, Blizzard and Thunder to combat a variety of Types. But its damage is so-so. Don’t be afraid of Dazzling Gleam and punch it to oblivion with a Fighting-type or other physical attacker.
Succeed against the guys who made the game and you’ll receive an Oval Charm, which increases the chances of finding an egg in the Paniola Ranch Nursery. If you still haven’t had enough fun, you can rematch the pair on subsequent days. You won’t get any more items, but it’s not a bad way to earn extra experience points.
Before leaving the office, if you ever complete the individual island Pokédexes or the entire Alola Pokédex, be sure to chat to Iwao along the right side. For each Pokédex completed, he’ll give you a stamp for your Trainer Passport. Meanwhile, if you finish the entire thing, he’ll give you a coveted Shiny Charm.
This item boosts the chance of encountering a Shiny Pokémon in the wild or as an egg. Normally the chance of finding one is 1 in 4096, but it becomes 1 in 1365 with the Shiny Charm. Which is still small, but less so. You’ll also receive a Karate Gi Outfit if you’re a male or a Pokémon Center Nurse Outfit if you’re a female.