Origin
Eeyore is a lovable donkey who hails from the 100 Acre Wood, He generally has a pessimistic, somewhat gloomy outlook, mainly due to his house which is made of sticks and continuously falls down. On top of this his tail keeps falling off and constantly has to be re-attached.
In other media
Eeyore (on top of numerous toys) made a brief appearance in the video game series “Kingdom Hearts”