Raises the holder's Special Defense by 50%, but also prevents the holder from using status moves.
The Assault Vest only prevents the Pokémon from choosing status moves, not from using them. If a Pokémon has selected a status move to use, but obtains an Assault Vest before executing the move, the move can still be executed successfully.
If the holder can only use status moves (due to Encore, Torment, knowing no non-status moves that have PP, etc.), it is forced to use Struggle.
guessing u can add this one just as u add life ball in its time.