Irwin Gets a Clue (S04E14)

After witnessing Billy, Mandy, and Grim in a fierce showdown with an unusual monster, Irwin feels the sting of rejection from Mandy once more. Enter Hoss Delgado, a ghostly exterminator, who steps in to assist Mandy in vanquishing the creature. Hoss takes Irwin under his wing, hoping to transform him into a "cool" hero to capture Mandy’s heart. Adopting Delgado's signature look and wielding an egg beater as a weapon, Irwin attempts to prove himself. However, when he faces a monster Delgado unleashes, he ends up embarrassed. Mandy bluntly reminds him that he’s just a nerd, but Billy reassures Irwin that being a nerd has its own charm.