Can you leave unova in Pokemon black 2?

Yes, in Pokémon Black 2, you can leave Unova after completing the main storyline. Once you defeat the Elite Four and become the Champion, you gain access to the Pokémon World Tournament and other post-game areas. Additionally, you can travel to different regions, such as the Pokémon Dream Radar, and use features like the Entralink to connect with other games.