Mr. Bouncer is Benjamin Bunny's father brother-in-law- to Mrs. Josephine Rabbit and uncle to Peter Rabbit, Flopsy Rabbit, Mopsy Rabbit and Cotton-Tail Rabbit. He is an inventor and some of his inventions are used by his son Benjamin, nephew Peter and their friend Lily on their adventures.His full name probably is Frederick B. Bouncer,and the B is likely to represents Benjamin,as seen in Series 1,The Tale of Jemima's Egg.
He likes inventing.
He is a brown rabbit with brown eyes and an old jumper.
The two of them have a very close father and son relationship, Benjamin looks up to his father and is always proved of his father's inventions.
- He builds inventions that are useful to hide from Old Brown in The Tale of Old Brown's New Roost.