The format for your sets is completely wrong, the sets should look like this:
move 1: Spore
move 2: Stun Spore / Toxic
move 3: Giga Drain
move 4: Sludge Bomb
evs: 252 HP / 252 Def / 4 SpD
Also, Clear Smog should be somewhere on this set to prevent Amoonguss becoming setup bait for dangerous sweepers such as Gallade.
Stallbreaker and Venoshock should not be sets, you can put both in OO.
Also, Checks and Counters needs to be much bigger, mention Lum Berry users such as Gallade and Substitute users who can block Spore. Pokemon such as Klinklang with Substitute can easily setup on Amoonguss.