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By the way, can someone tell me where I need to go after I beat the Flare members in the Power Plant? I went back to Lumiose, but the power is still out! What step am I missing? I guess I didn't read the dialogue close enough when I beat them, but I was pretty tired last night...
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You have to enter Lumiose from the other side in order to clear the blackout; just head south through the Badlands until you find an exit terminal.