Moblins serve the dark wizard Ganon and often appear in episodes that feature Hyrule.
In "Quest For the Potion of Power," a group of five Moblins attacked Rauru Town in search of information about the Potion of Power. Kevin Keene, Link, Princess Zelda, and Gameboy happened upon a Moblin who was threatening a villager. He called in the other four Moblins as reinforcements, but the heroes defeated them all and saved the villager.
In "Having a Ball," Kevin, Princess Lana, Link, and Zelda were attacked by Moblins and Stalfos while following King Hippo and Eggplant Wizard through the desert. They also saw a band of Moblins playing at the party in the villains' fortress.