Thonky.com's Pokémon Legends: Z-A Walkthrough

Tracie asks you for a Pikachu so she can test Thunder Stone evolution, and she'll give you a Heracross in exchange.

How to Start the Mission

This mission becomes available during Main Mission 05: The City in the Shadow of Prism Tower. To start the mission, go to Rouge Pokémon Center in northern Lumiose City, then look for the entrance to the shopping avenue in the same set of buildings as the Pokémon Center. You will find Tracie in this shopping avenue. Talk to her to start the mission.

How to Complete the Mission

If you haven't caught a Pikachu, you can find Pikachu in Wild Zone 3. After you catch one, talk to Tracie and agree to trade your Pikachu for her Heracross. Choose the Pikachu you want to trade, and the trade will begin. Tracie's Heracross is nicknamed Bois.

Rewards

You get 800 Pokédollars, 5x Poké Balls, and 3x Potions.