I'm still searching for my rare. fwiw, I have spent about 3 hours searching, and here's what i've found:
they do not seem to come up as secondary to the crabs, or any other pet in the zone. also, battling/killing crabs does not seem to help them spawn quicker, seems after i captured a common one and killed a few other grey ones, they quit spawning very much, so i waited 30 mins and tried again (vs. roaming all the lava pits over and over) and a few more spawned...seems it takes time.
1400 pets
I'm still searching for my rare. fwiw, I have spent about 3 hours searching, and here's what i've found:
they do not seem to come up as secondary to the crabs, or any other pet in the zone. also, battling/killing crabs does not seem to help them spawn quicker, seems after i captured a common one and killed a few other grey ones, they quit spawning very much, so i waited 30 mins and tried again (vs. roaming all the lava pits over and over) and a few more spawned...seems it takes time.