I'm surprised so many people are saying "Kirby"... might have to check that game out.
Any of you played Etrian Odyssey? It's pretty cool. RIDICULOUSLY HARD. Hard enough, almost, to not be fun. Right now I'm debating continuing playing. You level up for hours just to beat a mini boss, and move a few inches to the left, only to find another mini-boss that is even harder. More leveling up. I made a thread about it here actually, because that game reminded me what it's like to grind. (Worse than Bardstale era games, IMO).