I've been playing this game so goddamn long that I remember when the rainbow pool was first introduced, and you got to use it if you clicked on advertisements and signed up for bullshit. If you did a certain amount, you could morph your pet to any species and color you wanted. I used this for all 4 of my crappy pets. I used the FFQ to turn one into a striped tuskaninny. Ugh.
More recently, I traded an UC Mara Gelert (one of my favorite UCs) for a draik just a couple months before the value of draiks plummeted.