Is Kirby Super Star any good? I might get it as it's only 6 euros...
I know plenty people have already answered, but I just needed to emphasize. Yes, best Kirby hands down, but there's more. I'd say it's one of the best games on a system known for having an absurd amount of incredible games, but it somehow manages to overlooked by most people. It's also one of my personal favorite coop games to boot
And if pure quality doesn't sell you, it's also a really interesting history piece, as the game is pretty much the main inspiration for Smash Bros. in numerous ways, as well as being, in my opinion, the first of Sakurai's games to really display what he values as a game developer (namely, tons of content and options for the player)
Only reason not to get it is if you can get a good deal on the awesome DS remake