From Dragon Ball Wiki, the ''Dragon Ball'' encyclopedia
The Power Blitz (ブリッツ パワー, Burittsu Pawā; Literally meaning "Blitz Power") is an energy wave used by Android 17 and Android 18. The user draws his/her hand back and charges a swirling pink/blue energy sphere. He/she then brings his/her hand forward and fires the sphere in the form of an energy wave at the opponent, inflicting a great amount of damage.
Future Androids 17 and 18 used this attack to destroy a few buildings during their destructive rampage in a city. Future Android 18 later used it a few times during her and her brother's last battle with Future Trunks, though the Super Saiyan easily dodged the blasts.
Power Blitz was named in the Budokai series and is one of Android 17 and 18's attacks. However, Android 17's version is colored blue (like his Photon Flash in Dragon Ball: Raging Blast), while Android 18's is pink. It is called Photon Blitz in Dragon Ball Z: Supersonic Warriors 2 and it is Android 18's Super Attack. It is worth noting that in Dragonball GT, the colors are reversed. Android 18's version is blue while Android 17's is pink.