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I located my original Skylanders 3ds portal (from the first game) and that did work with the Trap team game. The only problem you might have with it is if you were to try a Swapmaster figure. When you try one of those the game will say you can't use this toy with this game. That is only because the original portal can't read that figure and not because the Swap master doesn't work with the game. You will need at least a swapteam or trap team 3ds portal if you want to use swapmaster figures. I believe that those would be the only figures that won't work with Trap team 3ds and an original skylanders 3ds portal and a giants 3ds portal which is the same type of portal. After all giants 3ds did have a portal owners package so it would have to be the same. I guess if anyone that had an older 3ds portal and could get the trap team game by itself cheap then they could play the game just fine they just wouldn't be able to use Swapmaster figures if that older portal was a giants or original 3ds one.