From Dragon Ball Wiki, the ''Dragon Ball'' encyclopedia
The Infinity Bullet (インフィニティ バレット, Infiniti Baretto) is a rapid-fired version of the Power Blitz used by Android 18. First, Android 18 raises both of her hands in front of her and charges a pink swirling energy sphere. Then, she fires many pink energy blasts out of the energy sphere at the opponent, inflicting a massive amount of damage.
Android 18 first used this attack as her future self in a frenzy to destroy a building after Future Android 17 killed a Human she thought was cute. Future Android 18 later used the Infinity Bullet during her and Future Android 17's battle against Super Saiyan Future Trunks. However, Future Trunks effortlessly deflected it and destroyed Future Android 18 with the Change the Future energy wave for killing his master, Future Gohan. Future Trunks later destroyed Future Android 17 with the Another End rush.
Infinity Bullet is named in the Budokai Tenkaichi video game series and is one of Android 18's Blast 2 attacks. It also appeared as one of Android 18's Super Attacks in Dragon Ball: Raging Blast. Android 17's version of the attack is called Accel Shot in Dragon Ball Z: Burst Limit. When he uses it, all the blasts converge together at one spot, causing a massive explosion.