Cheaper step down transformer may not provide enough power for the Gamecube to work properly. It may have a short life span or in a worst case spoil your Gamecube. So for long term gaming enjoyment please get a good quality step down transformer even though it's a bit more expensive. Actually Pasar Road is the best place to go look for it & bring along your Gamecube adaptor so the salesperson can advise you on the power rating of the transformer for you to purchase. You may even be able to get a local adaptor modified for Gamecube usage there.