Battle Ball is a reference to 'Bakugan Battle Brawlers'. A game played with balls with magnets inside and cards.
When explaining the game to Bart, one of the boys says that it makes Digimon look like Pokémon.
When Louie turns on the music for Fat Tony, the song At Seventeen by Janis Ian plays, which was previously used in "The Mysterious Voyage of Our Homer", while Homer was searching for his soul mate, this time played when Homer is with a soul mate of his. The song was also played during the end credits.
The cop show that Homer watches before changing the channel is an episode of the TV show Starsky and Hutch.