Trivia:
- Doing It for the Art: The little touches in this game rival the MOTHER series.
- He Also Did: Puresabe also did the Rockman New Year hacks, based on the animal zodiacs of Chinese New Year. The 2015 hack featured Sheep Man (Goat). The 2016 hack featured Spark Mandrill (Monkey). The 2017 hack featured Storm Eagle and Chill Penguin (Rooster). The 2018 hack featured Rush (Dog). The 2019 hack features Hyper Storm H (Pig). The thing that makes the 2016 and 2017 hacks unique is that they're based on Mega Man X1. Turns out Puresabe does more than the Mega Man NES hacks.
- Keep Circulating the Tapes: The leaked 0.01 Kurai release (containing the Bonus Boss fight with Shadow Man) has been taken down at the request of PureSabe, dooming it to this fate. Subverted when it became official in the 0.02 release, at which point it was rereleased.
- What Could Have Been: The Skull Amulet originally cursed Hell Wheel
if you got it by defeating Skull Man with the Recycle Inhaler, but now it protects you from fatal damage from enemies as long as you're above 1 HP.
Music used:
- Title: Unused Track from Mega Man V (GB)
- Stage Select: Ripple Star Map from Kirby 64: The Crystal Shards
- Stage Start: Stage Start (0:09 - 0:12) from Atlantis no Nazo
- Bright Man: Dream Chaser from F-Zero X
- Toad Man: Overworld from Kaeru no Tame ni Kane wa Naru / For the Frog the Bell Tolls
- Ring Man: Cheese Land from Mario Kart Super Circuit
- Drill Man: Main Theme from Challenger
- Pharaoh Man: Fillmore from ActRaiser
- Dive Man: Stage 3 from Mappy Kids
- Skull Man: Cloud Island from Adventure Island II
- Dust Man: Underworld Map from Doraemon: Giga Zombie no Gyakushu / Revenge of the Giga Zombie
- Boss: Off to War from Fire Emblem: Monshou no Nazo / Mystery of the Emblem
- Stage Clear: Evolution Complete from Pokémon Red and Blue
- Get Weapon: Isamashii from RPG Maker GB
- Secret Boss: Sunstar from Mega Man 5 (GB)
- Wire/Balloon Adaptor Obtained: Item Acquired from Super Metroid and beyond *
- Game Over: [[ Tada 10]] from Famicom Mukashi Banashi: Shin Onigashima.
- Password: [[ Utsagi Office]] from Famicmo Tantei Club: Kieta Kōkeisha
- Cossack 1: Intro Stage from Ninja Cop Saizou
- Cossack 2: Resistance Base from Princess Tomato in the Salad Kingdom
- Cossack 3: Sewer Stages from Ninja Cop Saizou
- Cossack 4: Castle from Princess Tomato in the Salad Kingdom
- Cossack Boss: Ogura from Densetsu no Stafy 3
- Wily 1: Okhotsk Vanishes from Hokkaido Serial Murders: Okhotsk Vanishes
- Wily 2: Overheat from Gradius II
- Wily Stage 3: Pursuit from Hokkaido Serial Murders: Okhotsk Vanishes
- Wily Boss: Evil from Densetsu no Stafy 3
- Wily Machine: Battle 3 (Dark King Battle) from Final Fantasy Mystic Quest
- Chimerabot #1 (Eleccut Man): Boss Themenote from Mega Man
- Chimerabot #2 (Quickwood Man): Boss Themenote from Mega Man 2
- Chimerabot #3 (Geminineedle Man): Boss Theme from Mega Man 3
- Wily Capsule: Final Stage/Ending from Doraemon for the Game Boy.
- Wily Stage 4note : Something Ghostly from Gradius II
- Wily Castle Escape: Halberd Escape from Kirby Super Star
- Game Clear: Kirby's Triumphant Return from Kirby Super Star
- Mega Man 4 Original Staff: Main Menu from Wicked 18/Devil's Course
- Robot Master Demo: Main Theme from the Fire Emblem franchise
- Staff Roll: Medley of the credits from Kirby Super Star, Kirby's Block Ball, and Kirby's Dream Course.
- Result: Unused Boss Theme from Mega Man V (GB)
- Special Mode: Stage Intro from the Super Famicom port of Lord Monarch.
- The Mechanical Arena: Illusion from F-Zero Climax
- Ready Arena Boss (Introduction): Helper to Hero Rest point from Kirby Superstar Ultra
- The Final Challenge in the TRUE Arena: battle theme from Final Fantasy V.
