Metroid Prime Speedrunning Wiki - User contributions [en]

Cannon Ball

2021-10-07T01:16:21Z

RoboJack:

'''Cannon Ball''' (sometimes informally referred to as '''Morph Ball Invulnerability''') is a special item in [[Metroid Prime 2: Echoes]] and [[Metroid Prime 3: Corruption]] that is temporarily given to Samus when she enters a designated morph ball cannon. It has three distinct properties:

* Total invulnerability while in [[Morph Ball]]
* An aura around the Morph Ball that deals 500,000 damage per frame
** This aura is capable of activating certain doors that were previously locked (though it cannot unlock currently locked doors) without needing to use a weapon against them
* Allows Samus to boost, even if she doesn't already have [[Boost Ball]]

Ordinarily, these effects are only given for a very short amount of time, as they are removed once Samus lands on standable ground, unmorphs, or touches the other side of the Morph Ball cannon. However, in a small amount of rooms, namely [[Workers Path]] and [[Sandcanyon]], it is possible to keep these effects until the player resets the game or uses another morph ball cannon. This is possible under two conditions:

* The ability to use a morph ball cannon in a room while the game thinks you're in another room ("wrong room")
* The ability to unload the room that contains the cannon while using it

The reason this works is because if the game unloads the room while Samus has cannon ball, the game will not be able to remove cannon ball from her inventory, enabling her to keep it indefinitely. Getting cannon ball has applications in speedruns, mostly in any% during the adult phase of the [[Chykka]] boss fight in order to skip it in its entirety.

==Rooms That Give Samus Cannon Ball==
* [[Central Area Transport West]]
* [[Gathering Hall (Torvus Bog)|Gathering Hall]]
* [[GFMC Compound]]
* [[Great Bridge]]
* [[Main Gyro Chamber]]
* [[Mining Station A]]
* [[Mining Station Access]]
* [[Mining Station B]]
* [[Portal Access A]]
* [[Reactor Core (Sanctuary Fortress)|Reactor Core]]
* [[Sacred Bridge]]
* [[Sacred Path]]
* [[Sanctuary Entrance]]
* [[Sandcanyon]]
* [[Temple Access (Sanctuary Fortress)]]
* [[Torvus Plaza]]
* [[Watch Station]]
* [[Windchamber Gateway]]
* [[Workers Path]]

===Cannons That Don't Give Samus Cannon Ball===
Additionally, there are a small amount of rooms in the game that have Morph Ball cannons, but don't give Samus Cannon Ball.
* [[Hydrodynamo Station]]
* [[Transit Tunnel East]]
* [[Transit Tunnel South]]
* [[Transit Tunnel West]]
* [[Undertemple Shaft]]
* [[Undertransit One]]
* [[Undertransit Two]]

==Workers Path Cannon Ball==
This is the method most commonly used in speedruns, done after returning the Sanctuary energy. It starts by doing the [[Secret World]] in [[Sanctuary Energy Controller]] and wallcrawling to Worker's Path. Once transitioned, the scan point that activates the morph ball cannon must be scanned. Once scanned, climb back up and transition back into [[Sanctuary Temple]]. Now, ceiling warp into Worker's Path and use the Morph Ball cannon. Once the room unloads, you'll have successfully gotten cannon ball.
{{#ev:youtube|https://www.youtube.com/watch?v=2GSHxFuESow}}

==Sandcanyon Cannon Ball==
This method takes advantage of the Bomb Guardian boss fight in [[Agon Temple]]. It works by activating the boss fight, performing the Agon Temple SW to get on top of the room, and using a charged Dark Beam shot to stun Bomb Guardian while vulnerable. The boss will cycle between being vulnerable and invulnerable while in this state, so as long as you keep freezing it, then you can continue to shoot Bomb Guardian from here. After the final shot is taken, you need to immediately ceiling warp back into Sandcanyon and take the morph ball cannon, making sure to hold down-right so that you fall below the room and unload Sandcanyon.
{{#ev:youtube|https://www.youtube.com/watch?v=UXVjGIDjl0c}}

==Watch Station Cannon Ball==
This method takes advantage of [[Watch Station]]'s connection with the room [[Central Area Transport West]], which uses a proximity load. It is also the most difficult of the existing methods with current knowledge, but also the fastest in a [[Tool-Assisted Speedruns|TAS]] setting.
{{#ev:youtube|https://www.youtube.com/watch?v=NcZjXg-xydE}}

==GFMC Compound Cannon Ball==
TODO: Description and video

==General Tutorial for Cannon Ball==
{{#ev:youtube|https://www.youtube.com/watch?v=UAd_CZNQMz8&ab_channel=RoboJack}}

Metroid Prime 2: Echoes

2021-10-07T01:09:35Z

RoboJack: /* Tutorials */

The sequel to [[Metroid Prime]].

==Useful Links==
*[http://www.speedrun.com/mp2_echoes Leaderboard]
*[https://www.speedrun.com/mp2ce Category Extensions Leaderboard]
*[[Metroid Prime 2: Echoes/General Speed Tricks|General Speed Tricks]]
*[[Metroid Prime 2: Echoes/List of Rooms|List of Rooms]]
*[[Metroid Prime 2: Echoes/List of Secret Worlds|List of Secret Worlds]]
*[[Metroid Prime 2: Echoes/List of Items|List of Items]]
*[[Metroid Prime 2: Echoes/Sequence Breaks|Sequence Breaks]]
*[[Metroid Prime 2: Echoes/Categories|Categories]]
*[[Metroid Prime 2: Echoes/Bosses|Bosses]]

==Tutorials==
*[https://www.youtube.com/watch?v=eWzwndSwJ8w Scan Dash Tutorial] by [https://www.twitch.tv/erinexplosives erinexplosives]
*[https://www.youtube.com/watch?v=UjnMyuUOGHQ Extended Dash Tutorial] by [https://www.youtube.com/channel/UCjY_6P7gecrXJrltVUU6r4w RoboJack]
*[https://www.youtube.com/watch?v=UAd_CZNQMz8&ab_channel=RoboJack Cannonball Tutorial] by [https://www.youtube.com/channel/UCjY_6P7gecrXJrltVUU6r4w RoboJack]
*[https://www.youtube.com/playlist?list=PLDxP2seaIUbsw3JF6IewjMy4aLndlihlM Out-of-Bounds Tutorials] by [https://www.youtube.com/channel/UCjY_6P7gecrXJrltVUU6r4w RoboJack]
*[https://www.youtube.com/watch?v=oAd28rsZFy4 Out of Bounds & Item Loss Skip Tutorial] by [https://www.twitch.tv/erinexplosives erinexplosives]
*[https://www.youtube.com/watch?v=raOQQR3kFPo Sandigger Tutorial] by [https://www.twitch.tv/erinexplosives erinexplosives]

Metroid Prime 2: Echoes

2021-10-06T02:25:49Z

RoboJack: /* Tutorials */