Yes, it's a brand new event pokemon that's not released in the wiki
yet(most likely to avoid spoilers). But if you want to get it, you
need to wander around in the corn maze. You can get 1 cornlet
everyday(as far as I know) after the maze resets.
Hope this helps :D
. . . . . . . . . . . . . . IN SEARCH OF MY LONG LOST
COUSIN, TRASHBIN . . . . . . . . . . . . . . .
Please contact me if you found anyone playing with grimer,
trubbish, and koffing since it's likely TrashBin.