I was looking through the fan fictions, browsing by universe and I'm just wondering what exactly is the [1]. Hybrid Universe [2]. AoStH (is that spelled right?) [3]. Sonic Underground????THANX!!! I really need to know! You rock!!!!
1) A combination of different established Sonic universes
2 & 3) Adventures of Sonic the Hedgehog (AoStH) and Sonic Underground (SU) are two very different Sonic cartoon shows from 1993 and 1999 respectively.

--True Red