Gronks

The Gronks are a species of alien which are seen fighting against the and failing. notes that they're lower-level, and would be unable to fight each other off, let alone the Spasmosaur.

Appearance
The Gronks are tiny in comparison to the Spasmosaur, which may indicate that they are approximately the size of an average human (the Spasmosaur's is not seen in comparison to any other beings than the Gronk, but other incarnations of the beast depict it as being rather massive). In the First Comics color printing of the Mirage Studios ouvre, they are depicted as having light blue skin, and their basketball uniform-like apparel is green and yellow.