The Bad Eggs: That Dirty Yellow Mustard (1996), Volume 2

Panaam, the aged mentor of Ript and Claude, is being challenged to a death duel in the sky by a younger Pteradon who intends to replace him as the high, exalted wise one. The dueling part doesn't scare him, but the flying part does. So it's up to Ript and Claude to help Panaam overcome his fear of flying. After all, who better to teach him about being scared than a couple of spineless cowards?