I know rare creatures are more hard to come by then an Eggblaster but has anyone seen a Death Gunner? Dub Witch?

Everyone talks about the 4 most widely known rare creatures. Al Rappy, Hildeblue, Nar Lilly, and Pouilly slime. But if you go into the create a conversation feature, it lists all these beasts, plus a Death Gunner, and a Dub Witch. Interesting.