undefined.The usual bells and whistles are here, including a digitized manual, different NGPC skins, and a rewind feature. As in the previous games, there's a distinct lack of a moves list, so you'll have to resort to repeatedly opening the manual, writing things down, or going to GameFAQs. Being able to play with a friend on a single system is nice, though, although The Last Blade won't give you the multiplayer mileage than Smash Bros. does. The Last Blade is fun, and another good NGPC game to add to your list.
Risky's Revenge is very much the Australopithecus of the Shantae series-something of a transitional form between the GBC game and Pirate's Curse. It's fun to play if you're a fan of the series, but I'll say that the next three games easily eclipse it.
I enjoyed King of Fighters R-2, mostly for historical purposes. It's interesting to see KOF gameplay shrunken down and still very playable, and the Chibi aesthetic works, somehow. Samurai Shodown isn't for me, but I sure hope that this series continues.