So, I warped around near the spot where Dave gives you further instructions regarding the adamantoise quest. I ran into a battle and warped straight out it because I didn't want to fight, but the game still thought I was in battle. I ran to Dave and started the quest, hoping the bug would then be over, but, well, it wasn't. I couldn't talk with anyone inside Kenny's neither could I leave. It's just funny that I somehow triggered to summon Shiva. At the end of the day I had to restart the game.