After Iceland City, go to the Underground City next to it. Defeat KAYO there, then go back and get your 4th badge from the gym leader. After that, go into the door KAYO was blocking in UNDERGROUND CITY, you'll end up in a new route. Go through the route until you see EVIL PETE. Battle him, and that's the end of the beta. Beta 2, which is the final release of this rom, is coming by the end of the year. Part 2 will be released next year on a completely different rom and thread.