Uploaded May 2025 | Updated September 2026, 2 weeks ago
Controlling luck-based events, known as an RNG Manipulation, is a technique that's sometimes encountered in Speedruns, particularly of older games. But how do they work?
This video will cover a bit of general theory as well as cover a few concrete examples of how a few Speedruns manage to control their luck (RNG).
Document about seed-searching for Whirlo: docs.google.com/document/d/1QrAd1dkGcye2jyIIzEy5zGsOs-mtvItgIsAMwYhZXkA/edit?usp=sharing
Further information about the "Pokémon Mystery Dungeon: Explorers of Sky" Quiz Manip: pmdspeedruns.miraheze.org/wiki/EoS_Quiz_Manipulation
Further information about RNG in the 3DS Pokémon Mystery Dungeon games: pmdspeedruns.miraheze.org/wiki/3DS_RNG_Information
Music used:
OneShot - My Burden is Light
OneShot - On Little Cat Feet
OneShot - On Little Cat Feet (ground)
Cuphead - Forest Follies
Whirlo - Sunny Skies
Pokémon Mystery Dungeon: Explorers of Sky - Treasure Town
Pokémon Mystery Dungeon: Explorers of Sky - Time Gear
Pokémon Super Mystery Dungeon - School Forest
Cuphead - Rugged Ridge
Kirby's Dream Land 2 - Rick's Theme
Kirby's Dream Land 2 - Coo's Theme
Kirby's Dream Land 2 - Red Canyon
Pokémon Mystery Dungeon: Explorers of Sky - Welcome to the World of Pokémon!
Cuphead - Treetop Trouble
Cuphead - Carnival Kerfuffle
Pokémon Mystery Dungeon: Explorers of Sky - Top Menu Theme
Games featured:
Cuphead, Castlevania: Dracula X, The Messenger, Pokémon Red, Pokémon Mystery Dungeon: Gates To Infinity, Pokémon Mystery Dungeon: Blue Rescue Team, Castlevania III: Dracula's Curse, The Lion King (SNES), Monopoly (NES), Castlevania (NES), Whirlo (SNES), Pokémon Mystery Dungeon: Explorers of Sky, Pokémon Super Mystery Dungeon, Kirby's Dream Land 2, Gimmick!, Gimmick! 2
Twitch channel: twitch.tv/sbdwolf
Controlling luck-based events, known as an RNG Manipulation, is a technique that's sometimes encountered in Speedruns, particularly of older games. But how do they work?
This video will cover a bit of general theory as well as cover a few concrete examples of how a few Speedruns manage to control their luck (RNG).
Document about seed-searching for Whirlo: docs.google.com/document/d/1QrAd1dkGcye2jyIIzEy5zGsOs-mtvItgIsAMwYhZXkA/edit?usp=sharing
Further information about the "Pokémon Mystery Dungeon: Explorers of Sky" Quiz Manip: pmdspeedruns.miraheze.org/wiki/EoS_Quiz_Manipulation
Further information about RNG in the 3DS Pokémon Mystery Dungeon games: pmdspeedruns.miraheze.org/wiki/3DS_RNG_Information
Music used:
OneShot - My Burden is Light
OneShot - On Little Cat Feet
OneShot - On Little Cat Feet (ground)
Cuphead - Forest Follies
Whirlo - Sunny Skies
Pokémon Mystery Dungeon: Explorers of Sky - Treasure Town
Pokémon Mystery Dungeon: Explorers of Sky - Time Gear
Pokémon Super Mystery Dungeon - School Forest
Cuphead - Rugged Ridge
Kirby's Dream Land 2 - Rick's Theme
Kirby's Dream Land 2 - Coo's Theme
Kirby's Dream Land 2 - Red Canyon
Pokémon Mystery Dungeon: Explorers of Sky - Welcome to the World of Pokémon!
Cuphead - Treetop Trouble
Cuphead - Carnival Kerfuffle
Pokémon Mystery Dungeon: Explorers of Sky - Top Menu Theme
Games featured:
Cuphead, Castlevania: Dracula X, The Messenger, Pokémon Red, Pokémon Mystery Dungeon: Gates To Infinity, Pokémon Mystery Dungeon: Blue Rescue Team, Castlevania III: Dracula's Curse, The Lion King (SNES), Monopoly (NES), Castlevania (NES), Whirlo (SNES), Pokémon Mystery Dungeon: Explorers of Sky, Pokémon Super Mystery Dungeon, Kirby's Dream Land 2, Gimmick!, Gimmick! 2
Twitch channel: twitch.tv/sbdwolf
![[Former World Record] All Bosses Speedrun - 23:41 - Legacy, Regular, Solo - Cuphead
Still lots of time saves. Got a 1:00 Hilda (+4), 0:33 Grim (+4), 0:33 Rumor (Why did I have to choke the one-cycle, +5), 1:31 King Dice (+5), 0:45 Devil (thanks spider, +7), plus a few minor time losses (I guess I lost 4 extra seconds on Ribby and Croaks over the extremely difficult super skip but I hardly can complain about that fight). Highlight of the run was Baroness Von Bon Bon with a near-perfect fight and a time of 0:28.
My controls:
Jump: Right Bumper
Shoot: Left Trigger
Ex Shoot: A
Switch Weapon: X
Lock: Left Bumper
Dash: Y [Former World Record] All Bosses Speedrun - 23:41 - Legacy, Regular, Solo - Cuphead](https://i.ytimg.com/vi/wzoLMTqs_dU/mqdefault.jpg)


![[Former World Record] All Bosses - 24:05 - Legacy, Regular, Solo - Cuphead
Lots of bad fights: 1:02 Hilda, 0:36 Baroness, 0:41 Wally, 0:37 Rumor. On the other hand I also had a number of great fights (0:30 Beppi, 0:39 Cala, 0:43 Devil and my first ever 1:27 King Dice). Sub 24 is closer than ever!
Still salty about that accidental parry on Beppi though
My controls:
Jump: Right Bumper
Shoot: Left Trigger
Ex Shoot: A
Switch Weapon: X
Lock: Left Bumper
Dash: Y [Former World Record] All Bosses - 24:05 - Legacy, Regular, Solo - Cuphead](https://i.ytimg.com/vi/xzsOVLvbgsg/mqdefault.jpg)
![Cuphead All Bosses Expert mode Speedrun in 25:18 (Legacy version) [Former World Record]
Didnt go for Hilda Glitch, a few rough splits but a solid deathless run nonetheless. Ill leave this time be for now to focus on Regular mode.
Apologies for no webcam and a worse microphone. I dont have access to better equipment currently, I will be back with my old setup soon enough.
My controls:
Jump: Right Bumper
Shoot: Left Trigger
Ex Shoot: A
Switch Weapon: X
Lock: Left Bumper
Dash: Y
Twitch channel: https://www.twitch.tv/sbdwolf Cuphead All Bosses Expert mode Speedrun in 25:18 (Legacy version) [Former World Record]](https://i.ytimg.com/vi/yY0DgCPN-Ms/mqdefault.jpg)
![[Former World Record] All Bosses Speedrun - 29:21 - Current Patch, Regular, Solo - Cuphead
Finally got this one back! Not completely happy with the run but Im satisfied for now.
My controls:
Jump: Right Bumper
Shoot: Left Trigger
Ex Shoot: A
Switch Weapon: X
Lock: Left Bumper
Dash: Y [Former World Record] All Bosses Speedrun - 29:21 - Current Patch, Regular, Solo - Cuphead](https://i.ytimg.com/vi/z-lKekZxh-g/mqdefault.jpg)
![[Former World Record] One Gun Lobber - 33:32 - Regular, Solo - Cuphead
I worked on this weird category extension as a trump card for the tournament that just ended. Too bad I didnt get to use it :P
My controls:
Jump: Right Bumper
Shoot: X
Ex Shoot: Left Trigger
Switch Weapon: A
Lock: Left Bumper
Dash: Y [Former World Record] One Gun Lobber - 33:32 - Regular, Solo - Cuphead](https://i.ytimg.com/vi/zFOJVRUKOaQ/mqdefault.jpg)
![[Former World Record] Full Clear Speedrun - 44:35 - Legacy, Expert, Solo - Cuphead
Terrible run. Will likely improve it in the future.
My controls:
Jump: Right Bumper
Shoot: X
Ex Shoot: Left Trigger
Switch Weapon: A
Lock: Left Bumper
Dash: Y [Former World Record] Full Clear Speedrun - 44:35 - Legacy, Expert, Solo - Cuphead](https://i.ytimg.com/vi/zVwRjV-fHKM/mqdefault.jpg)