its is in fact gaia. it mentions it many a time on the application main page. there is also a link to gaia on the page. and like your have noticed there are gaia characters in it. phwee (or maybe its gwee... dunno, the little green dragon) would be one...
Hm, IS it really a Gaia game? It doesn't mention Gaia at all anywhere on it.
Yeah, there was a Monster Galaxy FAQ on the Gaia Online Help Center, but they took it down when everyone started talking about it.
Also, the monsters, music, game play style, and art style is very similar to Gaia's ZOMG. It has to be Gaia. D: no one else has the music or art style.
You can steal music and copy stuff.
I was kinda suspicious when I noticed the similarities between a lot of the mogas and some Gaia items, but since a bunch of people are saying Gaia had a faq about Monster Galaxy, I guess they did make it.