On this page, I want to document occurences or glitches that haven't been seen before and that are unexplained and not reproducible yet. On this page I also want to provide a guide on how you can provide the best information possible, should such a glitch happen to you. Because recently, people have been unable - or even stubborn - to provide information, leading people to believe their reports might be faked.

Finder:
andrewg1990

Date:
24th November 2010

Game:
NES Super Mario Bros. (W)

System:
NES

Notes:
The player reset his console and mashed the Start key. The game then played the pause sound on the title screen (which is normally not possible) while also starting level 1-1. The game was then muted. The player proceeded to finish the level and softlocked until he paused and unpaused the game which brought the sound back.

Video

Finder:
xNight / DistortedPixel speedrun.com Youtube smogon.com
(Update: The user changed their name to Pixql.)

Date:
11th September 2015

Game:
GB Super Mario Land v1.1

System:
Gameboy Advance SP

Notes:
The player died in the middle of 2-2, but then respawned near the end of 2-2, mysteriously.

This image shows where exactly the player supposedly died. In case the image becomes defunct: After the middle area, the player died between the 2nd cloud and the 4.5th cloud.

The game seems to depend on address $FFE5 (X-Cam related) when choosing where Mario should respawn and in the above case, the player should normally have been placed to a checkpoint prior to the one where he was put (= at the end). If this occurence can be reproduced in a timely manner, it will save time in a speedrun and TAS.

Source (The posts by the finder do not exist anymore, for some reason. I have a copy of the page with all the finder's messages intact. I will upload it by request.)

Finder:
Arkanias565 Twitter speedrun.com Youtube Twitch.tv

Date:
26th September 2015

Game:
GB Super Mario Land v1.1

System:
BGB 1.5.1 Emulator
GBA SP

Notes:
There is a video of the occurrence.

The player has died twice in 4-1. Then enemies (cannons) started to spawn later than normal as the player ran through the stage. At the end of 4-1, the screen scrolled for a few pixels past the exit, and the player couldn't touch the exit, thus the game was softlocked.

Source

Update: The player claimed that he got it to work a few times now, including his GBA SP.

Finder:
imglower Youtube Twitch Twitter

Date:
5th October 2015

Game:
GB Super Mario Land

System:
Nintendo 3DS

Notes:
The game crashed in 2-1, supposedly after the player's star power wore off at the same time he grabbed a mushroom.

Source

On 21th August 2016, Oh_DeeR encountered a similar starman freeze in 4-3 on SGB2. Video

Finder:
Oh_DeeR Twitch Twitter

Date:
14th August 2016

Game:
GB Super Mario Land v1.1

System:
SGB2

Notes:
Part of the text in a fake Daisy's room is cut off. Instead of "Oh! Daisy" it displayed "Oh! Dais". Twitch VOD

Finder:
Wateroll Youtube

Date:
Reported 18th Aug 2016, performed in ~2014

Game:
GBA Kirby & The Amazing Mirror (Version: ???)

System:
???

Notes:

The player killed Master Hand in room 17 (Radish Ruins) and 'somehow' glitched out of the room. The player had Master equipped.

Source

Finder:
GuyYouWontRemember Youtube

Date:
Reported 14th March 2017

Game:
GBA Kirby Nightmare in Dreamland (European version)

System:
???

Notes:
The player had an ability (not specified which one). In Orange Ocean, level 5, room 3, the player hit the bomb block and moved forward. Then he was walking on the ice blocks underwater at normal speed.

See comments here.

Finder:
MUGG

Date:
2008~2009

Game:
GBA Dragonball Z: The Legacy of Goku

System:
VBA-rr v19~23

Notes:

The player gets punched by Jeeze, but instead of receiving damage, he gets healed by it.

See here.

Should a never-before seen glitch happen to you, please provide the following information in your report:

System
What system did you play on?
What region of the system (PAL, NTSC)?
If you used an emulator, which one was it? Which version of it (Look in the About section)?

Game version
Which version of the game do you have?
Gather information what versions there are in the first place - Look at GameFAQs (their release information shows you where the game has been released). Most often, games are separated between US, Europe and Japan.
Which revision of the game do you have?
This is the case only for some games. Ask around if your game has revisions (such as Super Mario Land v1.0 and v1.1). Consult The Cutting Room Floor for information on version differences.

Information
What is the bug that happened? Explain it with as much detail as possible.
What did you do before it happened?
Where exactly did it happen? Provide a screenshot and mark exactly where it happened.
If you are unable to take a screenshot, look up existing maps such as the ones on VGMaps, download them and mark where it happened, then upload them and link them.