Guardian Core is the first form of the final boss, a large Gunwall, that as the name suggests, protects the ship of the unnamed antagonist of Interstellar Assault. When defeated, the player exits the enemy base and follows the Escape Pod containing the enemy.
Pirior the battle, floor and cieling tiles will rip off and home towards the player.
It's top and bottom cannons shoot bouncing spherical energy bullets, and occansionally fires a large laser beam from the middle core.
There is a safespot in this battle - the small gap, directly where the laser is fired - all of the bosses' attacks will miss the player if he waits here. This makes this phase very easy.
|Game Boy Gradius games|
|Ships||Vic Viper • Coreship|
|Nemesis (Game Boy) Bosses||Volcano • Super Big Core • Zub Rush • Crawler • Maru Maru • Striker • Iron Maiden MK 2 • Reckless • Mother Computer Z|
|Gradius: The Interstellar Assault Bosses||Infected Statue • Core Reactor • Volcano Core • Keeper's Core EX • Guardian Core • Escape Ship|
|End Bosses & Major Enemies|
|Major Recurring Foes||Gofer • Bacterion • Dr Venom • Zelos Force (Zeros) • Lars Empire • Gofer Sisters|
|Minor Enemies||Brain • O.V.U.M. • Eleos Brain • Mother Computer Z • Guardian Core • Central Server • Genocide Core • Outer Limits / Metal Slave • Zelos Barrier • Doom • Dark Force|