Metal Sonic is great at breakdancing, along with Shard. They often challenge the others' skill at dance so it often becomes a fight so they settle it by having a dance off. Cyber judges of who dances the best and makes sure that no one else finds out about this. Sometimes Shard "cheats" by changing the music to different types like Salsa, Tango, Waltz, and such, but Metal makes comebacks.

Example.
Shard changes the music to the Macarena once and Metal started doing it, Shard was so shocked that he forgot about winning so he lost and Metal won.

(Bonus)
Shard has a video of Metal doing the Macarena and keeps it for blackmail.