Yoshi

Yoshi is a depressed character who misses his son, after losing him in a storm.

History
7 before Wario & Waluigi's Deadventures, Yoshi loses his son in a storm. He has been depressed ever since. But in later episodes, it's been shown he's becoming less depressed than before. As of Season 3, He is now an officer at the Diamond City Police Force.