After being revealed on SM4’s booster box, Registeel has now been revealed in full! Thanks goes to Vincent for the translation!
[M] Turbo Arm: 30 damage. Attach a basic Energy from your discard pile to 1 of your Benched Pokemon.
[M][M][C] Black Steel Fist: 90 damage. If Regice is on your Bench, heal 30 damage from this Pokemon.
Weakness: Fire (x2)
Resistance: Psychic (-20)