It's come a long way.
I've been playing the Spectrobes series since the original DS game. I've played every one. I have to say, it's rather entertaining.
The story could have been better, but they did what they did well. It felt like a Saturday morning cartoon, and I mean that in the best way possible. Considering the target audience (children ranging from the ages of 8 to 14) each game did it right.
It would have been a mediocre, but the graphics improved over time with the years. The first game's graphics were average, with only two high-quality cutscenes. The second game improves the in-game graphics somewhat and adds in more high-quality scenes. The third game's graphics, being for Wii and with the proceeds from two successful predecessors, were superb.
It's not something you'll find yourself scowering google search result pages for download links.
Gameplay: More than good, less than great.
the game play was fun, but easily became boring after a while in all three games (but was less prevalent in the third game due to the sheer amount of eye-candy.) Level grinding was a horribly boring, and it made me put down the games for several week intervals at some point (again, the third game manages to eliminate this by offering stronger spectrobes that can be excavated in the new areas, but the final dungeon lacks this luxury.) Although somewhat repetitive, I did enjoy the fights though.