The wonderful folks at GameXplain have been hard at work poring through The Legend of Zelda: Majora's Mask 3D for Easter eggs, and posting videos of their finds.
One such video details a familiar face in a hard-to-see area of the game world. In the back of Clock Town's Curiosity Shop, eagle-eyed players can spot R.O.B. hiding on a shelf.
This is just the latest in a long history of R.O.B. cameos in Nintendo games. Who knows where he'll crop up next?