Together with his wife, he owns the Wong Ranch and the entire western hemisphere of Mars, which his ancestor Sir Reginald Wong bought from Martians in exchange for a single bead. He always speaks his mind, which sometimes enrages people he doesn't buy off. He is blunt about Amy’s unattractiveness. He teases Amy about being fat. When she was younger, his jokes pressured her into losing weight.  He demonstrates an overall disregard for the environment in favor of profitable enterprises and materialism. For instance, Leo planned to bulldoze 12% of the milky way for his golf course without any regard for the lives that would impact. It is thanks to him that some parts of Saturn's rings are missing.
He states that he is a friend of every single judge on Mars when Professor Farnsworth suggests a lawsuit for mental anguish, showing he is virtually above the laws, much like Mom.
His wealth can be said to rival Mom or even more.
Leo is a rich farmer and mostly shown as a selfish and greedy man who would cause catastrophes just for the sake of making money. He is also very cranky and attempts to manipulate his daughter Amy's future for his own benefit.
- "A Flight to Remember"
- "Mars University"
- "A Clone of My Own"
- "The Luck of the Fryrish"
- "Where the Buggalo Roam"
- "Kif Gets Knocked Up a Notch"
- "Teenage Mutant Leela's Hurdles"
- "Proposition Infinity"
- "Möbius Dick"
- "The Sting"
- "A Farewell to Arms"
- "Viva Mars Vegas"