"Humoresque of a Little Dog" (also known as "Buy Something, Will Ya?" or "Drug Store") is a song found in all three titles of the Mother series.
It was recorded by Keiichi Suzuki and Hirokazu Tanaka in 1989.
In EarthBound Beginnings and EarthBound, "Humoresque of a Little Dog" can be heard throughout drugstores all over Eagleland and Winters. In EarthBound, its original soundtrack name, "Buy Something, Will Ya?", is a reference to the dialogue of the Merchant in The Legend of Zelda for NES.
The song can be heard through the jukebox in King P's playroom in the Thunder Tower. 'Humoresque of a Little Dog' likely refers to the dog located in the first drug store in Earthbound that tells Ness that it is possessed by the game's programmers.
It matches the Dallas Rag almost note for note.