Khuutra on 23 December 2008
Kirby Canvas Curse is probably still the best showcase game on the Nintendo DS, and yes, Kirby Super Star Ultra (or Super Star Deluxe I suppose) is arguably the best game in the franchise.
On the Virtual Console side of things, the Nintendo 64 game, Kirby and the Crystal Shards, is also great fun. You can mix and match different powers - so Spark + Cutter would be a double-bladed yellow lightsaber (I am not kidding), while Spark + Ice is Kirby turning into a refrigerator and shooting food at his enemies. It's worth buying for the power combos alone.
