3DS + Pokemon Platinum troubles

[geetry]

Hello, I am back again because I don't know what to do lol.

I got the new game yesterday. Brand new packaging, right out of the platinum official box. Definitely new and unused. No way it can be a pirate, as I bought it from a super trusty seller with tons of 5 star reviews on Amazon (I read the reviews to make sure they weren't just the seller writing their own reviews, haha).

Game reads fine, game doesn't fit snugly like the other one did (sign that your copy is pirated), game worked absolutely fine. Since I started playing yesterday, I hadn't exited the game once. I've just been saving and then closing my DS. I was at the battle with Jupiter at the Eterna Team Galactic HQ, and I had saved before just in case I did lose. I ended up losing, so I soft reset. Upon entering the game again, I got the dreaded blue screen AGAIN!! And I absolutely know this CAN'T be pirated.

I'm including a picture of the error this time to see if anybody knows what to do.
3DS games work PERFECTLY on my DS, the only problem I'm having is with Platinum.