Lol! never buy on impulse! Ever!

But yeah like earlier stated by the fabulous and sexy Xenonight2....Just take it back with the receipt and plead with customer service to accept the product for a full return.

Also you need to expect some restocking fees and perhaps if the DSi is open they might not even take it back at all. But eh if the DSi is opened just claim there was a defect and then ask for cash back....tell them you want to take your business elsewhere.