Turtle School Ultimate Fist (亀仙流超力爆殺拳 Kame Senryū Chōryoku Bakusatsuken, lit. "Turtle School Super Power Bombing Fist") is a Rush Attack used by Master Roshi in his Max Power state in the Budokai Tenkaichi series.
In Dragon Ball Z: Budokai Tenkaichi 2, Roshi shouts “Here we go!” and rushes at a high speed (despite his appearance in the max power state, being bulky, and age, being nearly 350 years old in the end of the original manga). When approaching his opponent, he knocks him/her up in the air with a left-handed uppercut. Then, he jumps up and follows with a headbutt from left to right, a straight headbutt, and then he makes a headbutt again from the left to the right, making the foe almost falling down to the ground again. Then, the muscular Roshi follows up with a hammer like strike with his both hands that sends the foe down making him/her slam into the ground, inflicting a great amount of damage.
In Dragon Ball Z: Budokai Tenkaichi 3, Roshi knocks the opponent in the air. Then, he punches the opponent and kicks them with a reverse kick. Next, he kicks them again before elbowing the opponent from above to the ground. Finally, Roshi does a front flip and smashes into the opponent's back with both of his feet.