There were like 4 or 5 aliens of different types and one of them was really intelligent (and short) and had telekinesis and was working with the human scientists, while another one was called something like 'Subject Zero' and was either invisible or could shape shift I think. Some of the more savage aliens escape and start killing the humans. I don't know if it was a blockbuster or not, but it was American. I think this film might be from the 90s or early 2000s.
Would really appreciate if someone could help me find this movie again.