Most Amoongus carry Sludge Bomb which will destroy Sawsbuck anyway and seeing as physically defensive Amoongus can take a hit ( I'm assuming here) Sawsbuck isn't really a good counter.
252 +1 Choice Band Sawsbuck vs Physically Defensive Amoonguss: Double-Edge: 375-441 (86.8 - 102.08%) -- 93.75% chance to OHKO after Stealth Rock
Admittedly, the recoil from Double-Edge would take a heavy toll, but Sawsbuck can do it.









