I find this frustrating as well. I have run out of room for all the different forms. There are over 800 base Pokemon, plus nearly 100 with gender differences, 30 unown, 20 Vivillon, 6 Rotoms, 7 Miniors, 5 versions of Flabebe, Floette and Florges, 4 versions of Deerling and Sawsbuck, 3 versions...