Any in particular you would recommend? Does Nintendo ever do eshop sales would live to snatch them all in a cheaper bundle or something.
Golden Pack for sure. You might also like Lost Bloodlines 2, Lost Bloodlines 3, Smash Brethren 2, Scramble Pack, and Apotheosis. Those are some of the most exceptional ones, I think.
Regarding sales, kind of. For Fire Emblem, Champions of Yore 1 was available for free for a limited time when the game released (and in turn, Champions Pack had a reduced price), and in Japan, Harvest Scramble was also offered for half price for like a week after it released. Other than that, the DLC in the game's never gone on any kind of random sale. I think it's theoretically possible (Zen Pinball 2 and Just Dance 4 for Wii U had their DLC on sale in North America, as I recall) but it's just never really happened at all, let alone with Nintendo's own games with DLC. I'm personally not holding my breath for it.