Alright, well once again, guys, this is gonna come down to a bit of luck, so Fossilus, brace yourself against those Rock Slides and DON'T FLINCH...
Fossilus: Brick Break (Bill) - Earthquake - Earthquake
Oki: Focus Blast (Bill) - Encore (Bill) - Focus Blast (Bill)
And with any luck, this'll bury Bill and we can then focus full efforts on trying to crack Big Poe without the use of Fighting moves!!