There are at least two bands under this name:
These are photos from concerts where Monster X played, so they may be of other bands that played the concert as well.
Monster X Jul 29, 1989 Huntington Beach, California, United States Uploaded by Monster X
Thelonious Monster / The Buck Pets / Monster X Jul 23, 1989 Los Angeles, California, United States Uploaded by Monster X
Monster X Jun 16, 1989 Los Angeles, California, United States Uploaded by Monster X
Monster X / Enticer May 24, 1989 Fullerton, California, United States Uploaded by Monster X
Monster X / Weirdos May 6, 1989 Huntington Beach, California, United States Uploaded by Monster X
