|Battle Maison’s Exchange Service Corner – 32 BP
You can only get an Up-Grade at the Battle Maison’s Exchange Service Corner. Here you’ll need to exchange 32 Battle Points (BP) per Up-Grade, and you can get an unlimited number of copies this way.
The Battle Maison is located at the Battle Resort, an island which only becomes accessible after completing the Delta Episode in the post-game.
Getting Up-Grades (Step-by-Step)
The Battle Maison operates similarly to the Battle Tower from previous generations. Winning battles in this battle facility rewards you with BP, which can be exchanged for a variety of items at the Exchange Service Corner, located within the entrance hall.
If you don’t know where the Battle Maison is, just head over to the Battle Resort’s Pokémon Center to get started.
Step 1: From the Battle Resort’s Pokémon Center, proceed slightly east and then head up the staircase at the nearby intersection.
Step 2: After going up the stairs, just keep going north and enter the Battle Maison.
Step 3: Once you’re inside, you’ll see two staircases going upstairs. Head up the left one.
Step 4: On the second floor you’ll find one of the Exchange Service Corner’s attendants. If you’ve got 32 BP, you can purchase the Up-Grade from her.
In the Exchange Service Corner, two attendants offer a wide variety of valuable items in exchange for BP.
The right attendant sells held items used in battles. The left attendant sells Vitamins, EV training items, and evolution items, including the Up-Grade.
Here’s a complete list of items offered as prizes by the attendant on the left:
Earning BP (Quick Guide)
To accumulate BP, you’ll have to take on the trainers in this battle facility. The various battle challenges here serve as the primary means of earning BP in the game.
Just beyond the curtains between the two Exchange Service Corners, you’ll find the arena where the battles will take place.
Speak to the receptionist right next to the PC to start the challenge.
But you’ll first want to assemble your most formidable team – then you can select your preferred battle format from the following options:
|Number of Eligible Pokémon
|A one-on-one battle.
|A two-on-two battle.
|A three-on-three battle.
|A three-on-three battle, with only one Pokémon fighting at a time. You can rotate between them during the battle.
|2 per player (4 total)
|You team up with another Trainer and fight in a two-on-two format.
With each victory, you’re awarded BP.
And longer win streaks give you even more BP.
When you defeat the Battle Chatelaine on the 20th battle in the Normal Rank, you unlock the Super Rank for that battle format. The Super Rank offers a tougher challenge, notably featuring a rematch with a Battle Chatelaine on the 50th match.
Check the table below to see how much BP you can earn per victory:
|20 (Battle Chatelaine)
|50 (Battle Chatelaine)
However, be aware that losing a battle will break your streak. That will force you to start a new challenge run to keep earning more BP.
Since Pokémon levels are set to 50 and you can’t use healing items, a solid strategy + fully trained Pokémon on your team are both crucial for success in the Battle Maison.
How the Up-Grade Works
The Up-Grade, a held item classified as an Evolution Item, has no effect in battle.
But it’s a unique item specifically designed for Porygon’s evolution when it’s held during a trade.
When a Porygon holding an Up-Grade is traded to another player, it will evolve into Porygon2. Once the trade is completed, the Up-Grade is consumed and disappears on evolution.
And once you get a Porygon2 you might be wondering how to evolve it into Porygon-Z.
For that you’ll need a Dubious Disc, which can be obtained in a similar way as the Up-Grade.
If you’ve accumulated at least 32 BP then you can get a Dubious Disc from the Battle Maison – then you can trade a Porygon2 holding the Dubious Disc to evolve it into Porygon-Z.