There are two areas that are not accessible when you are not champion. These are Terminus Cave, which holds legendary Pokemon, #718 Zygarde, and Pokemon Village, where #150 Mewtwo. To get to Mewtwo's Unknown Dungeon, you will need to have Surf. These two Pokemon are level 70. If it's not any of the two, then it might be the Lost Hotel, where a man also blocks you from passing.

There are two areas that are not accessible when you are not champion. These are Terminus Cave, which holds legendary Pokemon, #718 Zygarde, and Pokemon Village, where #150 Mewtwo. To get to Mewtwo's Unknown Dungeon, you will need to have Surf. These two Pokemon are level 70. If it's not any of the two, then it might be the Lost Hotel, where a man also blocks you from passing, but you don't need to be champion for this, you only need to learn the roller skate tricks.

There are two areas that are not accessible when you are not champion. These are Terminus Cave, which holds legendary Pokemon, #718 Zygarde, and Pokemon Village, where #150 Mewtwo. To get to Mewtwo's Unknown Dungeon, you will need to have Surf. These two Pokemon are level 70.

There are two areas that are not accessible when you are not champion. These are Terminus Cave, which holds legendary Pokemon, #718 Zygarde, and Pokemon Village, where #150 Mewtwo. To get to Mewtwo's Unknown Dungeon, you will need to have Surf. These two Pokemon are level 70. If it's not any of the two, then it might be the Lost Hotel, where a man also blocks you from passing.