Keep doing the rumbling in 1 same area over and over again. Make 1
rumbling session 12 hour. Your pokemon will explore more parts of
that rumbling area and they will get more item. If they found an
explorer bag then it's basically a 2× progress upgrade lol.
. . . . . . . . . . . . . . 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.