Alto Cino

Although I've been playing the game for a while, this is the first time I've made an account on this website.

You see, I think I've triggered a glitch earlier. On the part when you arrive at Ametrine City where you're supposed to talk with Shelly and split up, I went first to the house with a blue roof before talking to shelly at the place entering the city. Now I can't find anyone in Blake's room and I'm stuck. Can anyone give me some advise or help?