Orphan Glitch

From SpeedSouls - A Dark Souls Speedrunning Wiki

The Orphan Glitch is a glitch in Bloodborne that allows the player to temporarily freeze Orphan's AI. The effect can be extended for the entire duration of the fight, making it a great strategy for the All Bosses route and for players struggling with the boss in general.

The player simply backstabs or parries Orphan to cause it to become vulnerable and in the "visceral state". The player then must hit the boss with the appropriate consumable to weapon to trigger the glitch.

It isn't quite understood why the glitch happens, but the current theory is that Orphan of Kos does not have an animation associated with getting stunned out of a "visceral state" animation when hit with specific items and weapons. Since the game cannot display an animation that doesn't exist, the boss defaults to a standing animation until it is able to recover (between 4-6 seconds).

It is possible to trigger the glitch by using Pebbles, Throwing Knives, Poison Knives or a specific attack from the Blades of Mercy.

Execution

https://youtu.be/VYMnOm8ec_w Orphan Glitch (Blades of Mercy) video by EmnayIsay

https://youtu.be/9PgL2EtbLC8 Orphan Glitch (Poison Knives) video by Maarionete

https://www.twitch.tv/pr0flo/v/35410022 Orphan Glitch (Throwing Knives) video by pr0Flo

https://youtu.be/zN4F4XAqFmI Orphan Loop (Hunter Pistol) video by Otsunari