Gaming How can i use locked circuit in mario kart in wfc

[gab10]

he (japanese player) can choose waluigi pinball, shroom ridge, tick-tock clock, rowser castle,
donut plaints and banshee boardwalk in wfc

how could he can do that
a hack rom or a entered secret code?

 

[decept]

http://gbatemp.net/index.php?showtopic=43548