Speed Burner

Speed Burner, also known as Rushing Burner (ラッシングバーナー) in Japan, is the weapon that X obtains from Flame Stag in Mega Man X2 and Mega Man Xtreme. In normal fire, this weapon shoots a pair of intertwined fireballs in the direction X is facing. When fired especially on the ground, the two fire balls will also leave a trail of smaller flames behind which can also damage enemies. When used underwater however, only two non-flaming drones are shot and do little damage. A fully-charged Speed Burner will cause X to dash forward at high speed while engulfed in flames, damaging anything in his path. This can be performed on the ground or in the air. Using Speed Burner in this form can be very helpful when trying to cross gaps if X does not have the Foot Parts equipped, as this attack acts as an "air dash". If equipped with the Foot Parts, using a charged Speed Burner can can also act as a second air dash after the air dash from the Foot Parts has been executed, allowing X to cross even larger gaps.

Morph Moth is particularly susceptible to Speed Burner in both of his forms. In Mega Man Xtreme, it is also the primary weakness for Chill Penguin. In Mega Man X2, though this weapon will not stun him, Speed Burner is also Zero's weakness. In Zero's case, even if he guards against the actual fireballs, the smaller flames that trail behind them can still hit him. 

Damage Data Charts
Known damage values in units for Mega Man X2.

Mega Man X2
