Any two turn move in general. Be cool if you got lucky while an opponent is toxic'd.
If you have the ability no guard you will hit regardless of which 2 turn move you or your opponent uses.
I'm pretty sure you can get paralyzed if hit by thunder on bounce or fly. But I have no 100% sure idea.
Yes you can, both when start the move and on the second turn of the move. (the attacking part)