Singcada in Yo-kai Watch 2

Singcada can be befriended automatically by completing the King of Cicadas quest on the stairs up to Mt. Wildwood. Evening Cicadas can be found on trees in Breezy Hills at day. Then sleep seven times in-game to pass the week. Singcada can then be found with the Yo-kai Watch and will offer to be your friend without battling.

He can also be freed from the past Crank-a-kai with a Pink Coin and the Mystery Way - End Point (Main Line) Crank-a-kai with a Mystery Coin.