Board Thread:Fun and games/@comment-5760976-20170316223509/@comment-28390451-20170319203733

Arcade Zombie, If the Black Door  was a grass-type Pokestar Studios Opponents, Then why isn't He blocking you as if he was a Plant-like Door unless you unlock it with a key-like thing.

my guess is, The Black Door would be Smarty if he existed in PVZ world.