Grapple Guardian

Discovered by

BoostR

Use three uncharged Light Beam shots on the Grapple Guardian's eye to stun him, then fire a charged Light Beam shot into his back (and anything else you can manage to add :). You can use other weapons to stun him if you run out of ammo.
When the Guardian tries to grapple you, stand behind a pillar. This will make him grapple the pillar, and allow you to circle around behind him and pump him with charged Light Beam shots.

Posts by SamusAranLuver

When you stun him/her/it (whatever) when you dash to his back 1 or 2 super missiles will break his shell thus making the battle faster might be usefull in speed runs.

(If You do however get grapped by GG,lock on and blast one lightbeam at him uncharged and he/she/it will let go of you immediately.)

If you get hit by the GG stay behind the pillars across from him to regain health indefinitely.
Repeat both until he's dead.

If you are low on Light Beam ammo just before the battle, the hallway before Sacrificial Chamber is full of Ing storage dudes. Shoot them with Dark Beam to score a ton of Light ammo in very little time.

Rapid fire the power beam into it eye (you can probobly get a lot in pretty fast). As soon as it starts to grapple, charge up your power beam. When it grapples the piller, launch a super missile into it back. This will deplete it energy fast. When I did it, it had almost no health left (maybe 1/5 or 1/6) before losing it shell.
When you get rid of the shell, fire light beam shots (uncharged) into it's eye. It'll get stunned, allowing you to get around it and fire a charged Light Beam shot in the bare back. It'll take a lot of damage from that.

In a Speed Run; getting Grappled by Grapple Guardian saves a fair bit of time of time.