I am trying to compile a list and have gone thru all the threads in this section. The Royal ducks are AFAIK no longer sold, and the company is out of business so you guys are my only hope.  
 
I know the 11 originals were:
Camo
Tiger
Zebra
Hearts (on white background)
Lucky
Skeleton
Vampire
Hippie
Punk
And 2 different colored flame ones
 
Then there were apparently later ones that vibrated, 4 different ones?
I think one was a devil
and another was hearts on a pink background
also sailor
and plain yellow
 
Anyone know is this is right, and if my count (15 produced total) is correct?