Thank you to GhostRoaster.com and Shem Scoles who pointed me to a poster which shows all sixteen Swappables, including Rubble Rouser, Trap Shadow, Doom Stone.
The poster is available to buy on amazon.co.uk here.
With no further ado – here is the poster introducing the whole Swappable family:
The Trap Shadow words are the same color as Hoot Loop – so I expect he’s Magic. I’m guessing Rubble Rouser and Doom Stone are Earth – but I could be wrong!
Oooh it’s getting exciting now! Not long!