Okay, so I missed this one when it happened three weeks ago -- possibly in part due to the fact I'm no longer posting the full Nintendo Download to Mario's Hat any more, and so haven't been paying as close attention to them.
In case you missed it as well, Mega Man X2 arrived on October 6th in the Nintendo eShop for Nintendo 3DS, and is playable exclusively on the New Nintendo 3DS XL. Incidentally, there is no trailer for that version of the release, so have the Wii one instead:
The game can be yours for $7.99 if you're in the U.S., and $11.29 if you (like me) happen to reside in Canada.
Thanks to Forci for the insistence!