As a child Tyson had a Grumpy Bear stuffed toy.

Essentially, that's all there is to this particular head canon.

Tyson never watched the Care Bears cartoon growing up, and still hasn't, but Jethro won the toy at a school raffle when Tyson was six and gave it to his little brother.

This toy was treasured until Tyson's father forced him to give it away - along with other toys - when he was twelve.