bro i have pretendo but if i go to mario kart 7 on online... it gives me an error 006-0612. u know the solution?
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on the nimbus app switch network to pretendo
i also had that exact same error code. i think it has something to do with your internet not compatible with your 3ds. you could google the error code and you might see some solutions maybe.
wait. i was thinking of the wrong error. sorry.