The only reference I am unaware of is the card on the top right
Luigi's Mansion 3 BoxartLuigi's Mansion: Dark Moon BoxartLuigi SpriteMario & Luigi: Superstar SagaMap to the MansionLuigi's Mansion opening cutsceneL-capsuleDr. LuigiLuigi
Pose: Mario Bros. (Game & Watch)Colors: Mario Bros. (Arcade)Mr. LSuper Paper MarioLuigi sprite
Super Mario Bros.Luigi
Super Paper MarioMario & Luigi: Superstar Saga Japanese BoxartMario & Luigi: Dream Team BoxartMario is Missing CartridgeNew Super Luigi U BoxartLuigi's Mansion Japanese Boxart