Planet Puzzle League review at 1-up.

"Hardcore gamers may shudder in trepidation at Nintendo's "blue ocean" approach to game marketing, fearing that this newfound dedication to casual gamers puts the future of hardcore-oriented games in jeopardy. But that's silly, because it's not a zero-sum game; it's not as though Super Smash Bros. Brawl is in danger of being canceled to make room for another Brain Age, for instance. And on top of that, it means quite a few old-school fan favorites are getting new life, repackaged for a wider audience without gameplay compromises -- in short, making good gameplay more widely accessible.

Case in point: Planet Puzzle League for DS. Puzzle League, aka Panel de Pon (its Japanese title), has been around for more than a decade, riding the coattails of Nintendo's more popular franchises. It's as though the company has always been afraid that its exceptional head-to-head puzzle gameplay would bomb without being disguised as something different, which is why it's alternately been repackaged as a Tetris spin-off, a Pokémon title, and the poor cousin to Dr. Mario."

Full Source: 1-up