Once you obtain a badge it's permanently stored in the badge case.
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go to the Pokemon league and defeat them
in pokemon pearl,diamond or platinum you have to eight badges in pokemon black and then trade kadabra to you from yourself and it will evolve
yes but only if you have enongh gym badges
in Pokemon platinum you need to have (strength) you can obtain it at iron island but you can only get it when you have 6 badges.' check out my new website: http://pokemonds.moonfruit.com
You need to have seven badges and you need to beat Cyrus and face Giratina in the Torn World. To find out how to do that, look on www.psypokes.com and go on the Pokemon platinum walkthrough.