There are at least five artists who use the name Koala

1. An American experimental/post-rock band
2. A British psychedelic rock group
3. A Belgian trip-hop group
4. A Russian electronic project
5. A German rapper
6. An alternative rock band from UK
7. A German Trance project
8. Finnish bass project/movement.

1. The first Koala (experimental/postrock): They released their debut album "Xibalba" in 2010. The album consisted of six songs all composed, recorded, and mixed by the band.