Your search for "stufful - 034/sm-p" revealed the following:
Stufful (Japanese) - 034/SM-P - Promo from SM-P: Sun & Moon Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Artist: Kouki Saitou Card Text:[Colorless] Tackle (10)[Colorless][Colorless][Colorless] Hammer In (60)