Full Name Professor Erasmus Q. Tinkerputt
First Appearance (Barney and the Rocko Squad) Barney and the Never Land Pirates (Clip #1)
Barney and the Rocko Squad Portrayer Barry Pearl (classic clips)
"I brought over my highly unusual, extremely spectacular, completely amazing surprise, AND IT'S---!"
— Tinkerputt in Barney's Big Surprise, before being interrupted.

Professor Erasmus Q. Tinkerputt, better known as Professor Tinkerputt or just Tinkerputt, is a toy inventor, who became friends with Barney, the other dinos, and the kids. Tinkerputt used to live on Imagination Island, so that he didn't have to share his creations with anybody. In Barney and the Rocko Squad, he appears as a classic clip character because he let former Kyoto International School teacher, Lee Chaolan, take over his toy factory.

His guestbook never uses the right names. Listed below are the names in his guestbook (Italicized names were also used in Imagination Island):