If it had been released a few years ago, Opoona would have been one of those Japanese PlayStation 2 titles nobody ever noticed on the release list - one of those quirky, average games that no-one really knew what to make of. Thanks to the dearth of Wii RPGs, though, it might have better luck.
Opoona is a simple, charming Japanese space-RPG, miles away from others of its kind in tone, but not up to their standards in execution. It's interesting, though, sufficiently so to make it worth a second look for RPG-starved Wii owners; people with other consoles might wish to turn to shinier, bigger-budget productions like Lost Odyssey and countless PS2 games for their traditional-JRPG needs.
Opoona's toned-down cel-shading and relaxing, spaced-out music are a good indication of what to expect from the game: it's extremely laid back. You take control of Opoona, a cheery little spaceman whose ship ran into trouble on a family holiday, leaving him separated from his parents and siblings on a strange planet.