NES Classic Mini - 1 Game

Alright, so my friend knows I'm into console "modding" and such, and asked me if he could get Battletoads on his NES Classic Mini.

I said, it's decently involved, it will wipe everything, has the potential to brick it, and maybe not worth it for 1 game. He's not the type to really care about authenticity (and it's emulation anyway), so I suggested just to play it on the myriad of websites where you can emulate right out of a browser. I get that it's not the best solution as they probably don't have anything hooked to their TV that can do that (they're apple-only users as well. That's the other reason I didn't think modding their console would be a good idea for them).

Am I thinking right or should I just flash it for him and see how it goes?