He is an aspiring bike mechanic who Lana has a crush on.
In "L is for Love", when Lana suspects that the love letter directed to an "L. Loud" may have been written to her from him, she attempts to show her interest in him by "Souping up" his bike. She attached what appear to be jet boosters to it, which cause him to rocket, screaming, down a hill at incredible speed.
At the end of the episode, when the Loud children resolve to officially let their crushes know how they feel, Lana does so to Skippy by hiding a love note in his tool box, which he discovers with a smile.
Skippy has light fair skin, dark brown hair, freckles, and has a scratch on one side of the face. He wears a backward lime green baseball cap, a blue long-sleeved shirt with grease on it, gray pants with a smudge, and white shoes.