Anvil is a transformation that Conker can make when he is on a B pad. When used, Conker turns on a Anvil and can smash things on the ground. It is possible in Conker's Bad Fur Day and Conker: Live & Reloaded.
It is used to open the door that is in the Poo Cabin It is also used to open the doors that had money in it in Barn Boys. In Uga Buga, it's used to make the giant caveman statue head go down. It's last used on It's War chapter to make some bridges down.
In the kid-friendly Conker's Pocket Tales, he ground pounds to help him on his quest.