Nope, found the Adventure pack used without Terrafin, and ended up having to buy a complete adventure pack to get Terrafin for my son's collection, so I decided to list the 3 pieces that we had gotten used. You get the two boosters, and unlock the Pirate Seas level, so iI didn't want to just let them sit on the shelf when someone else might want them.
PS You can try your local Gamestops and might end up lucky, and find a used Terrafin, all depends on how many people in your area are trading in, and how many people are picking through, lol.