In a previous blog post I mentioned that the Magypsy Theme from Mother 3 sounds like Komm, Susser Tod from the End of Evangelion soundtrack. However, I was browsing wikipedia, and it mentions that Komm, Susser Tod may borrow its melody from the Procol Harum song, A Whiter Shade of Pale from 1967. The wikipedia entry also mentions Kom Susser Tod shares similarities to the Beatles' song, Hey Jude. The Mother games are full of Beatle samples.
Judge for yourself though, because I can't tell if I'm hearing things or not.