A skullasaurus is a monster that Owl told Pooh and his friends they would meet on their way to "skull" (school) to resuce Christopher Robin in Pooh's Great Adventure.
The Skullasaurus in Pooh's Grand Adventure is never seen. The skullasaurus is actually an imaginary creature made up by Owl when he sends Pooh and his friends to look for Christopher Robin at skull (school).
The skullasaurus makes a sound like the "rumbly tumbly of a hungry for honey... Pooh Bear".
Christopher Robin Milne died on April 20, 1996 at the age of 75.