What happens if I use my Cofagrigus' "Extended Damagriiigus" attack to move damage from one of my benched Pokemon to my opponent's Antique Cover Fossil with "Protective Cover" Ability?
Your benched Pokemon would remove its damage counters, but the opponent's Antique Cover Fossil would not remove nor receive any. If you try to move damage *to* something that blocks effects, the damage disappears. If you try to move damage *from* something that blocks effects, the damage stays there.
Extended DamagriiigusProtective Cover