"Unleash a fierce, wolven rush. Use Ki to keep the combo going!"
With more control of his ki, Yamcha can increase the power of his physical attacks, landing devastating blows on his opponent in rapid succession that can leave his victims battered and bruised. This technique is used by Yamcha in the 22nd and 23rd World Martial Arts Tournaments, against Tien Shinhan and Shen respectively.
The technique's name was originally translated in the FUNimation dub as Wolf Fang Blowing Wind. Later English sources call the move Neo Wolf Fang Fist, which is closer to the Japanese name which translates roughly to "New Wolf Fang Fist". Wolf Fang Blowing Wind likely refers to the hurricane part of Rōgafūfūken (Wolf Fang Hurricane Fist).
Appearances in games
The technique appears under the Neo Wolf Fang Fist in Dragon Ball video games, including Dragon Ball Z: Goku Hishōden, Dragon Ball: Revenge of King Piccolo, and Dragon Ball Z: Attack of the Saiyans. In Revenge of King Piccolo, when he uses the Neo Wolf Fang Fist, Yamcha finishes it with a much stronger blow. In Attack of the Saiyans, Yamcha finishes the Neo Wolf Fang Fist rush with a Kamehameha, possibly a reference to Yamcha showing his mastery of the Kamehameha after using Neo Wolf Fang Fist in his battle with Tien.
In Dragon Ball Xenoverse 2, Neo Wolf Fang Fist appears as one of Yamcha's Super Skills in his third skillset and can also be obtained by the Future Warrior as a reward in Parallel Quest 86: "Yamcha Is Number One" which is unlocked by speaking to Goten at the World Tournament Arena in Conton City after defeating both the Masked Saiyan and Masked Future Warrior in the main story. It is also used by Yamcha in his Supervillain form. 
In Xenoverse 2, the user can use ki to prolong the attack. When performed by a Male Future Warrior with Male Voice Option 8 selected, he will humorously refer to technique as Puppy Punch Part 2 which is a reference to the name his name for the Wolf Fang Fist, Puppy Dog Punch.