>>13689711first, it's only a 2HKO 10% of the time
second, misdreavus can easily OHKO with foul play after some residual damage on zangoose (probably a turn or two of poison)
Here's how it goes:
1. Seismitoad stealth rocks, wartortle switch-ins
2. Seismitoad Earthquakes, wartortle toxics
3. Seismitoad Earthquakes, wartortle rapid spins
4. Seismitoad Earthquakes, wartortle still spins
5. Repeat
6. Repeat, wartortle is ded, seismitoad is probably at 50% and sets up SR on the thing coming in since it's so bulky
Ded spinner, SR up, and even if seismitoad can't take the following hit, he can always switch out
or, you know, switch to misdreavus when wartortle spins and taunt it
Or you know, just EQ when it spins and switch out since you're still at near full health because spin is weak as fuck and switch in later and SR again
wartortle is and will always be a shitty spinner