Well scratch that thought.I'm thinking it could potentially be the 6 non-ex Gym promos: Drifloon, Drifblim, Pokemon Center Lady, Psyduck, Golduck, and TR Hypnotic Device. Especially with the Hippos being released in Destined Rivals instead of as promos
Now I'm thinking it might be the 3 remaining Professor's Research, the 2 remaining Black Belt's Training and Pokémon Center Lady