Warusou

Sorry for bringing this up again so soon - I've managed to find the Odd Key but I have no clue where to use it. Could someone PM me the answer?

I give up, could someone PM me the location of the Odd Key? I'm also a bit curious about the supposed secret in Narcissa's gym, I can't figure out what or where it is.

I've just beaten Keta's revenant and received the Diamond Punch Badge, but the gate to Route 3 (I'm assuming this is to the West of the training area in Sheridan Village) is still blocked. Should I be going somewhere else? Also could someone send me the Odd Key location because I guess that'll get peoples' attention.