Baby Felix is the rascally, childhood self of Felix, Friend of Baby Elsa, and friend in law of Elsa when everyone knows and loves. Even then, he has a knack for getting in trouble, cravings for chocolate, and most of all, a wild imagination, which sometimes allows him to communicate with his future (current) self. He is the title character of the Baby Felix and Friends anime.
He is nearly identical to adult Felix, but wears clothes (usually a onesie) and has a pink nose.
Being still young, Baby Felix is much less responsible than his adult counterpart. He is mischevious, and often lands himself in trouble, much like his adult counterpart.