These pencil sharpeners are also uncommon. These were produced by Toy Island, & released around the time of Sonic Adventure 1. However, they were difficult to find, even when new. As the box back shows, there were 4, but sold seperately. You could get Sonic Knuckles Tails or Big. Why is the Knuckles one the most common? Each character has been re-modeled into a 'mini' or 'chibi style' so the sharpening mechanism will fit inside. The back is removable to empty shavings, and the pencil turns in the characters' feet. While Knuckles here looks nice mini-styled, poor Tails doesn't seem to fare as well. This is about 2.5 inches high.