Metroid Prime/Bosses

Parasite Queen

The first boss in Metroid Prime, the Parasite Queen is located on the Space Pirate Frigate in the main reactor. It is surrounded by rotating shields and fires acid from its mouth. Plug missiles and beam shots into its mouth to defeat it. Defeating it will start the evacuation sequence.

Hive Mecha

Hive Mecha is a robot found in the Chozo Ruins. Hive Mecha is vulnerable in its center, when it is red. To make its center red, you must defeat a group of Ram War Wasps, a variant of war wasps. After doing this multiple times, Hive Mecha is defeated. After being defeated, you are rewarded with a missile extension, which allows you to regain the ability to fire missiles, which was lost during the evacuation of the Space Pirate Frigate.

Flaahgra

Flaahgra is a large mutated plant that is the source of the poisonous waters in the Chozo Ruins. Its roots are its weak spot, but they are protected by plant-like tentacles that attack you whenever you gets near.

How to Make Flaahgra Vulnerable

Flaahgra is surrounded by four dishes that reflect sunlight, and it needs constant solar energy from them. Each of the dishes can be shot from the side facing away from Flaahgra to slightly rotate them. When rotated to a 90 degree angle, that dish stops supplying energy to Flaahgra and is locked into place. When all of the dishes are locked into place, the tentacles stop guarding Flaahgra's roots for a short while.

However, Flaahgra can knock each of the dishes back to their original state relatively quickly when still supplied with power from other dishes. This increases the amount of time that the fight takes, so you should try to prevent Flaahgra from doing this. The one way to prevent this is temporarily stunning Flaahgra by firing missiles or shooting your beam at it.

Dealing Damage

While the roots are unguarded, you can switch to Morph Ball and roll through one of the tunnels where the tentacles were. At the end of each of the tunnels, there is a bomb slot, which when activated deals damage to Flaahgra and starts the next stage of the fight.

There are four stages of the fight, which are differentiated by the amount of dishes powering Flaahgra. The first stage of the fight has one dish, the second has two, the third has three, and the fourth has four.

Varia Suit

Flaahgra gives up the Varia Suit after it's defeated, which protects Samus from super-heated areas, such as Magmoor Caverns, the area that is access directly after the fight. Without the Varia Suit, accessing super-heated areas causes the quick loss of health.

Thardus

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Thardus (cinema)

Thardus is an experiment created by the Space Pirates who used Phazon on a group of rocks, but the Pirates gave up trying to pacify it since it became too dangerous. Thardus has the ability to control the weather, roll into a ball, hurl large rocks, and encase enemies in ice. It resides in a Quarantine Cave in the Phendrana Drifts. Defeating Thardus gives you the Spider Ball.

Omega Pirate

The Omega Pirate resides in the Phazon Mines. It is an extremely large Elite Pirate which is able to become invisible and regenerate health. It is considered by many fans to be one of the game's toughest bosses. It attacks with its powerful hands, a Wave Quake Generator, and a Missle Launcher. Defeating the Omega Pirate gives Samus the Phazon Suit, which protects her from Phazon damage.

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Omega Pirate (concept art)

Meta Ridley

The fight with Meta-Ridley occurs above the crater in the Tallon Overworld. Meta-Ridley has two forms: a flying form and ground form, who uses a number of weapons and melee attacks. His weak spot is the gem on his chest.

Metroid Prime

The final boss of the game. It exists in two forms: the first being a spider-like creature with mainly projectile attacks. This form is weak against Power Beam if yellow, Wave Beam if blue/purple, Ice Beam if white, and Plasma Beam if red. The second form being a hovering, ethereal tentacled entity. Stand in the pools of Phazon it creates and blast it with your new Phazon Beam.