Tuffy (Tom and Jerry)

Tuffy is a nepnew or brother of Jerry in Tom and Jerry. He is also known mostly as Nibbles. He appears in Castaras, but with the name Nibbles. He does not appear in Castaras babies. In most of the Tom and Jerry movies, he is seen with them and has been a very valued member.

Tom and Jerry: The Magic Ring
He is a mouse tormented by two other mice Freddie and Joey

Tom and Jerry: A Nutcracker Tale
Tuffy serves as Jerry's companion on a quest to find the toymaker after the cats, lead by Tom abduct the Music Box ballerina and take over the kingdom in the film

Tom and Jerry Meet Sherlock Holmes
He is a church mouse

Tom and Jerry & the Wizard of Oz
He is a munchkin who desires the height

Tom and Jerry's Giant Adventure
He is a very big mouse, much to Tom's shock and surprise

Tom and Jerry: Back to Oz
He was locked in a cage by the Nome King