Near the beginning of "Monster Mix-Up", the Mario Bros, Toad, and the Mushroom King go up a hill to find Princess Toadstool. The King remarks, "The people look like ants from up here!" And Toad tells him, "Your Majesty, those ARE ants. THERE's the circus."
In Koopa Capers, Bowser asks if Wendy stole his book of Reptile Magic and VCR Programming Instructions.