Blood-sucking bat.
No, he is not an Animagus, if that is what you mean.
since severus snape had a doe patronus and he wasn't a marauder, then he has no nickname on the marauders map. however, the marauders did have a nickname for snape being snivellus as a mickey take on his name severus.
By pressing the same button that you used to turn into an animagus in the first place.
no. in the 6th snape kills dumbledore. in the 7th, voldemort kills snape and harry kills voldemort
There actually is no Animagus spell. It is never actually told how to become an Animagus, so thus no one will be able to answer your question. Sorry.
They can only turn into an animal if they are an animagus, which is a rarity in the wizrd world. Animals cannot be wizards though.
What page does snape say to turn to in prisinor of askaban.
394
Minerva McGonagall turns into a cat. She is an Animagus who can transform into a tabby cat at will.
Sirius Black transforms into a dog using the Animagus transformation. His Animagus form is a black dog and he is known as Padfoot.
Snape is a rotten bully.
Rita Skeeter, the reporter. Her Animagus form is a beetle