Rain Flush

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Rain Flush
Artwork for the Rain Flush in Mega Man 4
Game information
Description: Screen nuke which can also increase your jump distance while active.
Damage: 1
Added in version: 1.5.4
Series information
Game of origin: Mega Man 4
Other appearances: Mega Man IV
Programmer(s): WreckingPrograms
Spriter(s): Zedicon (weapon icon)

Rain Flush is Toad Man's signature weapon, originating from Mega Man 4 and reappearing in Mega Man IV. It is featured in Mega Man Maker as of version 1.5.4.

When the attack key is pressed, the user sends a pod straight up into the sky that harmlessly passes through all entities. After 1 second, the pod detonates, covering the whole screen in a shower of acid rain that damages enemies and most objects. On/Off Switches, Bokazurah, and Soccer Ball Jets are unaffected. The rain shower hits up to 5 times, and can push the player when in the air with the strength of a level 5 Rain object, with the direction of the push depending on where they were facing at the time of firing. If Rain is already present onscreen, Rain Flush will cancel it out while it's active. Unlike other water-based weapons, it can only extinguish Oil fires, and will raise Chemical Solution's level due to containing acid.


Rain Flush


  • Rain Flush was chosen to be added to the game by a player named Lenny as a reward for being the winner of the Retro Redux challenge event. The contest's prize was being allowed to select a Robot Master weapon of the six NES games to be added between 1.5 or 1.6.
  • It was capable of causing Quicksand to harden in Mega Man IV, but it lacks this ability in Mega Man Maker due to time constraints.

Mega Man 4
Weapons Mega BusterRing BoomerangDive MissileSkull BarrierFlash StopperDust CrusherDrill BombRain FlushPharaoh ShotRush CoilRush Jet
Enemies Skeleton JoeTogeheroShield AttackerSuper Ball Machine Jr.SkullmetTaketentoGachapponMinoanWall BlasterTotem PolenPakatto 24DocronMummiraGaryobyLadder PressHeliponRing RingBattanSea MineRattonWhopper
Level Objects Dust BlockCossack PlatformRing PlatformCoil PlatformQuicksandFork Block
Bosses Ring ManSkull ManToad ManPharaoh ManCossack CatcherWily Machine 4
Other Pages TilesetsBackgroundsMusic

Mega Man IV
Weapons Mega BusterRing BoomerangFlash StopperRain FlushPharaoh ShotPower StoneNapalm BombCrystal EyeCharge KickBallade CrackerRush CoilRush Jet
Enemies Press'nTaketentoMinoanGaryobyRing RingRattonBomb/Rock ThrownSubeilSumatranBombierCoccoJet Bomb
Level Objects Shifting Falling StoneGuts HoverMove HoverNapalm Fire
Bosses Ring ManToad ManPharaoh ManStone ManCharge ManNapalm ManCrystal Man
Other Pages TilesetsBackgroundsMusic