Is anyone aware of a release--CD or otherwise--of cleaner-sounding versions of the character themes from Wario Ware: Mega Microgame$? I'm specifically looking for Kat's Oriental Blues; I've heard high-quality versions of other themes, Dribble & Spitz I believe, but I don't know where they came from. What I'm talking about is basically the exact same arrangement as the GBA originals, but with CD-quality recording as opposed to the 'fuzzy' limitations of the GBA's sound output.

Any leads would be greatly appreciated!

The Kat & Ana theme is titled "Haru Natsu Aki Fuyu." A high-quality version appeared on the GCN port, Mega Party Game$: http://www.youtube.com/watch?v=svIRy6hmiWw  I believe there was also an arranged, instrumental version on the port.

The Dribble & Spitz theme was also featured on a CD release, but no such luck for the Kat & Ana theme.

Now that you mention it, I really, really want a Wario Ware soundtrack.

I found the arranged version from the GC game, which I thought was either the sole version they used in the game or a version that replaced a vocal version in Western releases. In any case, it exists, so I'm happy. Thanks for the revelation of its existence as well as its true title.

A Wario Ware soundtrack--if complete--would be a little unwieldy, but it'd make for some great ringtone fodder at the very least. The longer tunes were quite catchy, though, and diverse at that. I think many people associate Wario Ware with frenetic minigames and forget about the quirky character and charm that was crammed in every nook and cranny. Those little touches all over the place made the game a lot more enduring for me than what I originally bought it for (a serviceable portable Dr. [W]ario).