You're walking through Hoenn when you accidentally stumble upon Maxie

Maxie: Huh? Who are you? Are you looking to join Team Magma? I can get you in right now if you'd like

Suddenly, running is heard from a distance, and someone runs up to you and Maxie

Archie: Hey! Maxie! He/She isn't gonna join you! This one's mine, got it? Archie turns to look at you Nice to meet you, I'm Archie! Leader of the superior, Team Aqua! Let's get you back to the base, we can get you set up there. Come on!