Mickey's Surprise Party

Mickey's Surprise Party is a 1939 American animated short film directed by Hamilton Luske, produced by Walt Disney Productions and distributed by National Biscuit Company. It was the 105th short in the Mickey Mouse film series to be released, and the second for that year.
Mickey's Surprise Party is the first cartoon with Mickey and Minnie Mouse in their current designs, created by animator Fred Moore. In the short, Pluto's romantic partner is Fifi, a Pekingese who also appears in Puppy Love (1933), Pluto's Quin-puplets (1937) and Society Dog Show (1939).