"Dragon Ball Lightning Explodes!" There are many powerful moves in "ZERO", and smash sprint is one of the more commonly used ones. The method is to hold down the square or X key in any sprint combination to perform a smash. The keyboard is not very clear yet.
How to use Dragon Ball Lightning Explosion ZERO Smash Dash
Smash Dash can be performed by holding down Square/X during any dash combination. Release as soon as your character glows blue to perform the Vanish Smash.
Triangle/Y can also be charged, but it has little use other than to increase power.
Additionally, any smash can be performed in an upward or downward direction, smashed from above or below. Depending on the direction of the opponent's defender, this may stun them, or it may stun you!
PS:
□ > □ > □ > □ > □
□ > □ > □ > □ > △
□ > □ > □ > △
□ > □ > △
□ > △
Xbox:
X > X > X > X > X
X > X > X > X > Y
X > X > X > Y
X > X > Y
X > Y
The final hit (when Y) is usually a slight counterattack or stun, but this depends on the character. Be sure to practice each one in case it has the effect you want.
Continue pressing Square or X up to 10 times to perform another "simple" combo of Vanish > Slam + Knock Up > Knock Down.