When Roger explains the bad things he's done to people, he mentions a girl named Tina. He says he taught Tina to dart her tongue out when she kisses. This is a reference to Bob's Burgers because Tina Belcher kisses that way.
Character flashbacks: Ricky Spanish kicks an old lady in the crotch in front of a Boy Scout. Ricky Spanish uses a flame-thrower in a petting zoo. Ricky Spanish takes an upskirt shot of a nun at a water fountain. Ricky Spanish defacates into an open chest cavity during surgery. Ricky Spanish steals a lollipop from a little girl. Ricky Spanish doesn't hold the elevator door for a businessman running towards it.
"Plantain Republic" is a parody of Banana Republic.