Bolboros is the boss of stage 4 in Gradius Galaxies.
Together, the Bolboros duo fires lasers. The smaller core will fire similar to Big Core MK I, while the larger will attack with covering fire. They don't seem hard until you destroy one of the cores. If you destroy the big ship, the small ship will freak out, opening it's two "shoulder blades" and firing streams of tiny bubble bullets. These "shoulder blades" can be destroyed if enough firepower is concentrated on them. If you destroy the small ship, the big ship will start moving around, firing lasers every time it stops. The small blue laser emitters can also be destroyed, lessening the amount of fire coming your way. Eventually, it will trap you in the middle of the screen, while (on loop 2) firing laser streams, and will also fire a large red laser. There is a safespot for this laser, right in front of the core, just like the final gun wall in Gradius: The Interstellar Assault. However, the laser's kickback can be problematic.
|Stages||Meteorite • Glass • Artificial Galaxy • Underground Volcano • Moai • In Vivo • Comet • Fortress|
|Bosses||Terra Core • Crystal Gust • Volleone • Bolboros • Dogaltes • Brachion Eye • Perla Meralda • Rexion Core • Cliff Core • Rotating Wall • Eleos Brain|
|Big Cores||Big Core MK I • Big Core Rev. 1.2 • Big Core MK II • Big Core MK II Kai • Big Core MK III • Big Core MK IV|
|Big Core variants||Beacon • Blaster Cannon Core • Bubble Core • Circle Core • Coreship • Crater Core • Crystal Core • Dellinger Core • Desert Core • Heaven's Gate • Juggler Core • Laser Core • Lizard Core • Neo Big Core • Perla Meralda • Rexion Core • Rolling Core • Shining Core • Super Big Core • Terra Core • Vanishing Core • Viva Core • Genocide Core • Odin Core|
|Core-style bosses||Abaddon Warship • Bubble Eye • Covered Core • Covered Core MK II • Dead End • Kraken • Mayhem Warship • Metal Slave • Misfit Warship • Queensrÿche • Riot Warship • Plate Core|
|Pseudo-Cores||Death • Death MK II (DeathDouble) • Death MK III • Beta Core • Nobil • Triple Core • Crash Bam|
|Tetran variants||Tetran (Zylom) • Covered Tetran • Crystal Core D-X02 • Laser Tetran • Tenny Rop|