Demo glitch: Difference between revisions

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I have contacted the current record holder on TASvideos, who has recently found an improvement but it hasn't been verified on a real console yet. The demo glitch itself, works fine on my GBA.
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The "'''Demo glitch'''", is a bug in ''[[Densetsu no Starfy]]''. It has become increasingly popular for speed runs of the game, as its exploitation allows players to take control of the [[wikipedia:attract mode|attract mode]] and skip to any stage from the second stage.
The "'''Demo glitch'''", is a bug in ''[[Densetsu no Starfy]]''. It has become increasingly popular for [[wikipedia:tool-assisted speedrun|tool-assisted speedrun]]s of the game. The exploitation of the demo glitch allows players to take control of the [[wikipedia:attract mode|attract mode]] and skip to any stage from the second stage.


==Exploitation==
==Exploitation==


If the title screen is kept running the first demo will run as usual, though if it is exited when [[Starfy]] is falling into a hot air balloon (with an x-coordinate of 130), the moment the next demo starts Starfy will collide with the ground and the demo play will de-synchronise allowing Starfy to take control from the second stage.
When the player waits at the title screen, they have a chance of viewing the [[Coral Reef]] demo where [[Starfy]] runs and jumps into the [[Balloon]]. If it is exited when [[Starfy]]'s x-coordinate is 130, this causes incorrect playback of the next demo, provided that it is the area of Coral Reef where Starfy normally swims past [[Moe]] and around the room. Instead of behaving normally, Starfy will swim left into the wall and collide with the floor before swimming back and hitting Moe with a [[Star Spin]]. This initiates a conversation with Moe, which ends the playback of the demo because the game expects the player to press the 'A' button or the 'Start' button to continue. After the conversation with Moe has finished, the player is free to control Starfy as if they were using a regular save file.


===Factory defaults===
===Factory defaults===
If the player saves using the [[Mermaid]] or the suspend-save feature, it will overwrite the existing save in File 1. The game is considered to be "completed". It would have a star next to the save file, meaning that the player is able to see the post-game title screen.


*Access to every stage.
*Access to every stage.
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*Ability to get treasure.
*Ability to get treasure.


===Drawback===
===Drawbacks===


*Exploiting the glitch prevents the player from completing the picture book, so it is no longer possible to complete the game 100%.
{{#ev:youtube|SCRN_RhC3OU|270|right|Densetsu no Starfy "any% run" in 06:34.6 (TAS)}}
*Exploiting the glitch prevents the player from completing the picture book, so it is no longer possible to fully complete the game.
*Saving the game after the demo glitch will overwrite the existing data in File 1.
<br clear=all>


==External links==
==External links==
*[http://tasvideos.org/2865S.html TASVideos entry of a ''Densetsu no Starfy'' speedrun].


*[http://www.youtube.com/watch?v=SCRN_RhC3OU Densetsu no Starfy "any% run" in 06:34.6 (TAS)].
<!--Unconfirmed on a real game (there are apparently differences between certain emulators) - The current record (03:32.45) by Jesselun, which combines this glitch with a save corruption exploit.-->
 
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Revision as of 00:14, 26 January 2012

The "Demo glitch", is a bug in Densetsu no Starfy. It has become increasingly popular for tool-assisted speedruns of the game. The exploitation of the demo glitch allows players to take control of the attract mode and skip to any stage from the second stage.

Exploitation

When the player waits at the title screen, they have a chance of viewing the Coral Reef demo where Starfy runs and jumps into the Balloon. If it is exited when Starfy's x-coordinate is 130, this causes incorrect playback of the next demo, provided that it is the area of Coral Reef where Starfy normally swims past Moe and around the room. Instead of behaving normally, Starfy will swim left into the wall and collide with the floor before swimming back and hitting Moe with a Star Spin. This initiates a conversation with Moe, which ends the playback of the demo because the game expects the player to press the 'A' button or the 'Start' button to continue. After the conversation with Moe has finished, the player is free to control Starfy as if they were using a regular save file.

Factory defaults

If the player saves using the Mermaid or the suspend-save feature, it will overwrite the existing save in File 1. The game is considered to be "completed". It would have a star next to the save file, meaning that the player is able to see the post-game title screen.

  • Access to every stage.
  • All methods of transport are unlocked.
  • Orange blocks can be broken.
  • Ability to get treasure.

Drawbacks

Densetsu no Starfy "any% run" in 06:34.6 (TAS)
  • Exploiting the glitch prevents the player from completing the picture book, so it is no longer possible to fully complete the game.
  • Saving the game after the demo glitch will overwrite the existing data in File 1.


External links

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