Hundred Gunner

The Hundred Gunner is a boss in Final Fantasy VII. Barret Wallace, Aeris Gainsborough, and Red XIII encounter it in the Shinra Building. Instead of the normal boss theme playing during the battle, the regular battle theme plays.

Strategy
Barret is the only party member who can reach Hundred Gunner with normal attacks. Aeris and Red XIII must use Limit Breaks or magic. Have them cast Bolt as much as possible, as Hundred Gunner is weak against Lightning.

When its HP is reduced to 533, it changes into its final form, where it uses its "super weapon," Wave Artillery. Wave Artillery is used after its Sensor Cannon is fully charged.

After Hundred Gunner is destroyed, you move on directly to the battle with Heli Gunner without yet gaining EXP, AP, or gil. These are obtained after the battle with Heli Gunner.