Bouncy A A Milne creation first introduced in 1928 volume The House at Pooh Corner (6)
I believe the answer is:
tigger
(Other definitions for tigger that I've seen before include "8's friend (the bouncy one)" , "friend of Pooh" , "Bouncy friend of 19" , "One of Pooh's friends" , "Bouncy beast (Pooh)" .)