Don

Don is a character introduced in Season 10 of Fairly Oddparents. He is a ball of yarn with googly eyes and a mouth, created by Catman as a friend and confidant. Thanks to Cosmo and Wanda's magic, he sometimes comes to life.

Personality
Timmy acknowledges that Don is a ball of yarn and can't do anything other than that. However, Catman, Cosmo, and Dad consider Don to have a personality. Catman considers Don his best friend and will argue with him as such, believing that Don has feelings for Catman's love interest, Wonder Gal. Cosmo considers Don to be a great listener, and Dad slyly notes that Don is in fact interested in Wonder Gal and treats the fact that Wonder Gal used a part of Don's yarn to knit a sweater as proof that Don lost weight in order to impress Wonder Gal.

Brought to Life
In two episodes of Season 10, Don was brought to life by Cosmo and Wanda's magic. When this happens, Don can walk, talk, speak, and serves as Catman's partner for all of his crimefighting.

Don is in fact interested in Wonder Gal and will waste no time delivering cheesy come-ons towards her. Timmy does not like his part of the living Don's personality. Chloe Carmichael considers Don to be completely creepy.

Catman and the living Don fight just as often, and the two have come to blows over Wonder Gal.