Yoku Block

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Yoku Block
Yoku Block.png
Official artwork of a Yoku Block from Mega Man: Dr. Wily's Revenge
Description: A block which appears and disappears. Dwoooooop.
Category: Level Objects
Game of origin: Mega Man 1
Programmer(s): WreckingPrograms
SnoruntPyro (alternate skins)
Spriter(s): WreckingPrograms (default gray blocks)

Yoku Blocks (officially called as Appearing Blocks, Bun Blocks, Tenmetsu Blocks, Vanish Blocks, or simply "Blocks"[1]) are disappearing and reappearing single-tile blocks from nearly every installment of the main Mega Man Classic series. They have been featured in Mega Man Maker since version 1.0.0.

Yoku Blocks will appear and then disappear after a short period of time to create a temporary platform that the player and enemies can walk on or run into. The timer in which Yoku blocks spawn is split into 5 parts, once a block spawns it will stay for an additional segment of time then vanish instantly once the next occurs. Timing is important when it comes to navigating areas with Yoku Blocks, especially with those that have clusters of Yoku Blocks set to spawn at different times.

If a Yoku Block spawns while the player or enemy is standing in the same tile space or just one under it, they will be forced out of it usually upward but sometimes to the sides or downward if there is space. However, if a large group spawns while the Player is in the same space they will die when the group of blocks appear.


From 1.5.0 onwards, the appearance of the Yoku Block can be changed. There are multiple skins of Yoku Blocks from the original Mega Man games. Those Yoku Blocks with an appearance distinct from the basic grey one have a shadow underneath though the shadows do not obstruct the creation or setting of elements underneath. Some Yoku Blocks produce a higher pitched sound when appearing.

Icon Stage Game of Origin Added in Version
Elec Man Mega Man 1.5.0
Ice Man
Heat Man Mega Man 2
Magnet Man Mega Man 3
Wily Castle 1 Mega Man 4
Dark Man Stage 1 Mega Man 5
Wily Castle 2 Mega Man 6
Plug Man Mega Man 9
Endless Mode
Sheep Man Mega Man 10 1.6.0
Endless Mode 1
Endless Mode 2
Challenge Mode
Wily Gear Fortress Mega Man 11

Reflecting Yoku Block

Reflecting Yoku Block
Reflecting Yoku Block.png
A Reflecting Yoku Block in Mega Man Maker
Description: A block which appears and disappears, and reflects shots.
Category: Level Objects
Game of origin: Mega Man & Bass
Programmer(s): WreckingPrograms
Spriter(s): WreckingPrograms

Reflecting Yoku Block is a special variant of the Yoku Block from Mega Man & Bass that acts like regular Yoku Blocks but also deflects most types of projectiles shot by the player. It was added in Mega Man Maker in version 1.5.0 and is listed in the General category of the level objects.

The Reflecting Yoku Block uses the same time patterns of the regular Yoku Blocks (1-5) and the disappearance when the Yoku Block timer is two numbers greater than the number of the block.

While most shield weapons are not deflected by Reflecting Yoku Blocks, Jewel Satellite and Water Shield are deflected by the blocks.



  • "Yoku" is a japanese word, meaning "frequently" or "often". This is likely in relation to the blocks appearing and disappearing on a regular basis.
  • Despite the entities being referred to as "Yoku Blocks" in Mega Man Maker, the name is not actually official, instead a popular fan given nickname. The term "Yoku Blocks" originated from Mega Man Unlimited, in where Yoku Man has been stated to be behind the creation of all of these blocks in the series.
  • Yoku Blocks appear in every main series classic game, with the only exception being Mega Man 8.
  • The grey Yoku Blocks featured in Mega Man Maker share their appearance with none from any game in the franchise and are unique to the game.
  • The Reflecting Yoku Block is the first level object from Mega Man & Bass introduced in Mega Man Maker. Similarly to weapon Block Dropper, it was added to Mega Man Maker before its game of origin was implemented.
  • Some Yoku Blocks skins have a different sound effect depending on which game they are from.


  • If Yoku Blocks spawn inside a boss while they are up against the corner of a room, instead of being forced out of the blocks they may instead be shoved into the wall causing them to walk around inside it, teleport rapidly, or abruptly die in a random corner of the screen depending on the room's layout and tiles used.


Content from Mega Man 1
Cut ManBomb ManIce Man
MetOctopus BatteryBeakPicket ManScrew BomberKiller BulletKiller Bullet SpawnerCrazy RazyBig EyeFlying ShellFlying Shell SpawnerSpineWatcherTackle FireFootholder
Rolling CutterThunder BeamFire StormIce SlasherHyper BombSuper ArmMagnet Beam
Level objects
Yoku BlockFire BeamElec BeamFlame PillarSuper Arm Block
Content from Mega Man & Bass
Treble Boost
Level objects
Reflecting Yoku Block