Froggies be crazy, yo.
I can't figure out why this frog is just tormenting this duck. Did he do something to his parents or something like that? Is he responsible for some kind of embarrassment in the past? It's not just that he's annoying the crap out of him. He never even ends up revealing that he was the one that put Duck through this, and Duck just ends up feeling like he solved the problem on his own. It's just bizarre.
Message
When you can't find something, it's probably being hidden from you for no apparent reason by a small frog.