Burning Uppercut

Burning Upper is Zero Kurogane's second special that was used in episode 6 of Zero-G against Shinobu Hiryuin.

Metal Fight Beyblade Zero-G
The bey starts by moving in different directions on the stadium gaining more speed. The bey gains even more speed while on fire also engulfing the stadium in fire as well. It then uses that extra speed to crash into the opponent's bey right out of the stadium.