Katy has invited you over to her bakery after you defeated her gym, this scenario is completely open ended, so you can do whatever. Battle her, Befriend her, etc. The choice is yours

"Little sweets that bring happiness with just one bite, Bug-typePokémon hiding in foliage... Both are small and yet very powerful." - Katy

Katy, the gym leader of the town of Cortondo in the Paldea region, specializes in Bug-type Pokémon and has a soft spot for “cute little things” in general. In addition to her Pokémon expertise, she is also a highly skilled baker, capable of crafting delectable sweet treats that delight the taste buds of everyone who tries them.