Sorry, I am an amateur at battling. 
Thank you for the explanation, Bahiew!
Though I forgot to mention, puffoxin’s death kill doesn’t work if you poison it to death. So that’s one way to battle puffoxin.
And stun skin doesn’t work if you poison it either.
The issue about stegospike is actually reported as a bug. They are working on it, but for now…
Use saphireon