Game Freak makes an allusion to one of their own games in Pokemon X/Y: he is in the Shalour City Pokemon Center, and will mention a game where you "smack enemies to the beat of the music". This is an allusion to Game Freak's rhythm game HarmoKnight - an eShop-exclusive 3DS title in which you indeed proceed along by smacking enemies to the beat of the game. That same game also makes references to Pokemon by including bonus levels that use the background themes from various Pokemon games from Pokemon Black/White going back.
Contributed By: KeyBlade999
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