I've been doing many sparring matches against Decius, here are some of the pets (or possible hybrids)I've seen:

Possible Hybrids:
Longhorn Jackalope (Orange Jackalope)
Cool Ranch Dilo (Tan Armadillo)
Moonstone Spider (Blue Version of Coral Widow)
Jungle Chameleon (Green and Orange Chameleon)
Bubblegum Chameleon (Pink Chameleon with pink polka dots)

Unseen Pets (not listed on the wiki):
Santa Crawlie
Pal Crawlie

I do have screenshot proof of all these pets, I try to figure their combinations out by looking at their talents. Here's what I think:

Longhorn- White-Tailed Jackalope X Sabertooth Bunny
CR Dillo- Armadillo Verde X WT Jackalope (Probably this one)
MS Spider- Coral Widow X some blue pet (or this might be a drop from a spider boss)
Jungle Chameleon- Orchid Chameleon X Jungle Toad or Iguana
Bubblegum Chameleon- Cutie Chameleon X Bunnicorn

The Santa and Pal Crawlie look like the Crawlies from the gift card.

I hope you all help in testing out these combinations!

-Black Wolf Bowman