I'm not too familiar with hatching, though I do know a little I think from hatching in the Test Realm. With any random pet that a level 48 ice quest pet is hatched with, it'll usually just come out as another colossus or something. But I have seen many Ice Wraiths or Deathzillas or whatever. What pets can a Colossus be successfully hatch with to create a new species like that?
This is a question that is pointless. Basically your collosus can hatch with other 48 pets to make a new species, which we call hybrids. the 48 pets include:
-Helephant -Stormzilla -Orthrus -Satyr -Wraith -Hydra -Your collosus is a 48 pet, though you dont wanna hatch with one.
Hybrids with the collosus base or coloring include Sand man, Ice Hound, Frostzilla, Ice oni, Frostcaller, and more. Apparently your tough luck may hold you back, but keep trying. eventually you will get a hybrid.