Dev Island

I just beat all 8 devs but the door to the tower is still locked. Is there anything else i need to do?

How do you get to that island?

Fly there with the emolga taxi. It’s near Selene city. Pheonix, can you tell me what the door says when you try to walk in or interact with it?

there actually a total of nine trainer there

it says “The door is locked. On the front of the door reads an electronic panel with 8/8 illuminated”