Rip the Pokémon icons (aka party sprites, box sprites, minis, ...) from Pokémon X, and probably also Pokémon Y. (I don't have a dump of Y to test it on.)
Requires JuicyPixels (tested with 3.1.7.1).
This is a Haskell port of pokemon-x-y-icons, which I wrote in Python. This version doesn't keep the palette order — in fact, the PNGs it creates don't use palettes at all — and doesn't add sBIT chunks. Unfortunately, at the time of writing, I can't fix either of these issues with JuicyPixels, and there doesn't seem to be any better alternative. (JuicyPixels can handle palettes, but not with transparency.)
It also doesn't create nice filenames or flip icons that should be flipped but those should be easier to fix.