this is completely wrong. the problem is in the game itself not the hardware, this version was designed to run on the original 3DS, and had access to the New 3DS extra power. I play on a New 3DS and it has always crashed, and the New 3DS is a system with over double the processing power and memory. it's the game. not the 3DS.
it sucks people who don't know what they're talking about are assuming its a problem with the console and blaming it, because the 3DS is a fine console. it may be unnderpowered but it has never crashed running a well optimized game.
if it was a problem with the hardware we'd see other demanding games crash too wouldn't we? but no, when a bug free game struggles to run on the 3DS it just lags or runs slow, never crashes.
the only thing you can blame the 3DS for, is for the game not being able to handle much more content. that is all.