Your next promotion match will be against none other than Jacinthe of the SBC.
Earn a Challenger's Ticket
If you haven't earned a Challenger's Ticket yet, you will need to battle in Battle Zones at night. Sit in a bench (which can be found next to every Pokémon Center, for example) to go to night time if it's day, and battle trainers until you have earned a Challenger's Ticket.
Go to Hotel Richissime
Go into Hotel Richissime and talk to Lebanne. Then talk to Lebanne again when ready.
Canari of DYN4MO has a level 53 Heliolisk, a level 54 Ampharos, a level 54 Stunfisk, and a level 55 Eelektross that she Mega Evolves. You get 3960 Pokédollars for winning. Talk to Lebanne to start the next battle.
Ivor of the Fist of Justice has a level 53 Heracross, a level 54 Medicham, a level 54 Machamp, and a level 55 Falinks that he Mega Evolves. You get 3960 Pokédollars for winning. Talk to Lebanne to start the next battle.
Corbeau of the Rust Syndicate has a level 54 Arbok, a level 55 Roserade, a level 55 Gyarados, and a level 56 Scolipede that he Mega Evolves. You get 4032 Pokédollars for winning.
Battle a Surprise Challenger
Talk to Jacinthe. Then talk to Zygarde to start the battle. It is level 57. It is very weak to Ice, and weak to Dragon and Fairy moves. Be careful to keep your distance from your Pokémon or you will get hit by Zygarde's attacks and could black out.
Battle Jacinthe
Talk to Jacinthe when you are ready to battle her. Jacinthe of the SBC has a level 57 Carbink, a level 58 Aurorus, a level 58 Mawile, a level 58 Gardevoir, and a level 59 Clefable that she Mega Evolves. You get 4248 Pokédollars for winning.
You get TM020 Play Rough.
This begins Main Mission 31: A Summons from Vinnie.
Buy Pokémon Legends: Z-A for Nintendo Switch 2
Buy Pokémon Legends: Z-A for Nintendo Switch