Scooter is a muppet, and originally served as an assistant backstage on The Muppet Show.
When Brian tries to point out to Stewie that it isn't easy to work with an ex in "The Boys in the Band", a cutaway gag shows Scooter asking Miss Piggy about calling in sick the previous day. As she brushes it off with humor about having a "frog in her throat" while giving Kermit the Frog a poke in the ribs, he tiredly suggests she quit drinking.
As an elderly Seamus has been kept on hold for years for Spirit Airlines in "Rich Old Stewie", Scooter steps into his room to announce that it's almost time to go onstage. Seamus is torn between wanting to fly to Pittsburgh and hosting The Muppet Show.