Yellow Devil

"Bumo... Bumomomo! Bumomo Bumomomomo Bumo!"

- Yellow Devil

Yellow Devil (イエローデビル), also known as Rock Monster or Yellow Demon, is a gigantic robot, the first combat robot created by Doctor Albert W. Wily, originally appearing as a fortress boss in the first Mega Man game. His body consists of yellow goo-like shape-memory parts that can dismantle and fly across the screen to attack his enemies. His only weak point is his red eye.

Mega Man
Yellow Devil can be very difficult to defeat due to his complicated attack pattern, being able to split into 19 parts that move in a set pattern. When assembled, the red eye that is his weak spot appears and fires a projectile, giving Mega Man a chance to hit the eye once or twice before disassembling again. His weakness is Thunder Beam.

Mega Man Powered Up
In the remake of the original game, it is revealed that Yellow Devil can talk, but the only thing he can say is "Bumo", which he says in various ways in order to form his own language. Cut Man attempts to speak to him, but without much success as it only seemed to insult the monster. Ice Man appears to understand what Yellow Devil is saying, however, and says that even though Yellow Devil has a mission, he has his own mission, too. Oil Man just copies his "bumo"s. Bomb Man doesn't understand what he says and tells him to speak in a "language that can be understood".

His attack pattern in New Style is different from the original. On Easy Mode, he will just stand in one place and reveal his eye to shoot energy spheres. On Normal, he splits into parts like the original game, but in 15 parts with a different pattern. The same attack pattern is repeated on Hard, but it can also fire a laser beam at the player either from the ground or the wall. To avoid the ground laser, the player has to stand near the wall and jump at the correct time. To dodge the wall laser, the player just has to run near him. If the player stands near him, he will sometimes try to crush the player with his hand. This time, he is weak to Fire Storm.

Mega Man: The Power Battle
Yellow Devil appears as the penultimate boss of the "Mega Man 1~2" and "Mega Man 3~6" courses. In the "Mega Man 1~2" course, he jumps back and forth and sometimes takes on a round form and attack with a laser. He also attacks by splitting into nine parts that fly across the room, throwing a cube-shaped part of his body that bounces across the room, slamming enemies with his hand to pull the target into his body and launch them at high speed, and blasting his upper body into four fists diagonally to punch foes. His weakness is Super Arm.

In the "Mega Man 3~6" course, Yellow Devil only jumps back and forth. After taking a small amount of damage, Yellow Devil splits into three smaller versions of himself with horns. One of the miniatures will stay the ground, jumping around and firing three small projectiles or splitting in three parts. The other two miniatures will walk around the ceiling and attack by releasing three large energy spheres. After the small version in the ground takes some damage, he will jump to the ceiling and change places with the other miniatures. After all three receive enough damage, Yellow Devil will reform and jump around the room. He is weak to Gyro Attack.

Mega Man 2: The Power Fighters
Yellow Devil is the penultimate boss of "Rescue Roll!" course. His attack pattern is similar to the "Mega Man 1~2" course from The Power Battle, except that his splitting attack changed and the four-way fist blast was removed. He can walk and defend against attacks in this game. He is weak to Thunder Beam.

Mega Man: Battle & Chase
Yellow Devil is one of three enemy racers (the others being a 4 Roader and Joe), forcing himself inside a blue vehicle to be able to race. The heavyweight vehicle has no weapons, but its rams are powerful. There is also a secret boss recolor of him called Black Yellow Devil.

Super Smash Bros. for Nintendo 3DS / Wii U


Yellow Devil appears as the main stage hazard in the Wily Castle stage from the Super Smash Bros. franchise, being deployed from the castle itself in the background. He behaves and fights similarly to his 8-bit counterpart, firing multiple balls of energy from his single eye and splitting up into 20 parts to reform on the other side. His pattern is the same as in Mega Man, but with one extra part between the 6th and 7th part, which is actually the empty space between the legs. Players can choose to fight him by attacking the exposed eye, his only weak spot. If defeated, Yellow Devil will release a highly damaging explosion, which will count as an attack for the player who dealt the final blow.

Other appearances

 * Yellow Devil has a cameo appearance in the opening cutscene of Mega Man 8.
 * Yellow Devil was shown in the first trailer of Rockman Online, but the game's cancellation as well as lack of footage featuring him makes it impossible to determine where he was intended to appear and what role he was supposed to play.
 * Yellow Devil could be obtained in an event from Yuusha no Kuse ni Konamaiki da DASH!, where he is said to be made of liquid metal.

Variations
Direct variations of Yellow Devil.

Yellow Devil MK-II
Yellow Devil MK-II is a version of the Yellow Devil that appeared as a boss in Mega Man 3.

Yellow Devil MK-III
Yellow Devil MK-III is a version of the Yellow Devil that appeared as a boss in Mega Man 11.



Black Yellow Devil
Black Yellow Devil (ブラックイエローデビル) is a dark Yellow Devil from Mega Man: Battle & Chase that drives a red vehicle and talks by making growling sounds. He is the boss from the Black Troop.

New Yellow Devil
New Yellow Devil is an enhanced version of Yellow Devil created by Ra Moon in Super Adventure Rockman. He is the game's final boss.

Damage Data Chart
Displays the amount of damage in units that Yellow Devil will receive from each Special Weapon from the original Mega Man.

Dialogues from Mega Man Powered Up
Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Mega Man: A robot made for combat? Well you're gonna have to get out of my way!

Yellow Devil:"Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Roll: What?! You think that because of I'm a girl, you can defeat me?! How rude!

Yellow Devil:"Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Proto Man: "When you attack me, watch out for my unstable nuclear core... One big shot and we're both vapor, I'd say.

Yellow Devil:"Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Cut Man: ...Huh?... Uh, um... Bumomooo Bumoooo Bumomomomoooo..?

Yellow Devil:"Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Guts Man: "You got a nice frame on you! But you won't win if we start matchin' muscles, pound for pound!"

Yellow Devil: "Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Ice Man: Hmm, Hmm, I see... But I also Have my own mission... I can not allow you to derail me.

Yellow Devil: "Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Bomb Man: Bumo, bumo—that's all you can say?! Speak in a language I can understand!

Yellow Devil:"Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Fire Man: You're a big fella, ain't ya?! But it don't matter! My Flames will engulf you! Firiiiie!!

Yellow Devil:  "Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Elec Man: I'm sorry, but I'm in a hurry. We'll have to finish this in a flash.

Yellow Devil: "Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Time Man: I understand. I will stop everything... for eternity.

Yellow Devil:"Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Yellow Devil: "Bumo... Bumomomo! Bumomo bumomomomo bumo!"

Oil Man:Bumo, bumo, bumo! Aha ha ha!

Yellow Devil: "Bu, bumoooo?! Bu, bumomomomo?! Bumomomoooo!!"

Mega Man (Archie Comics)
Yellow Devil appears in the first issue when Mega Man is entering Wily's fortress. However, during the fight, the scene cuts to the (chronological) start of the story. The battle's conclusion is shown in the fourth issue. Mega Man destroys the Devil with the Mega Buster as he doesn't want to use the weapons copied from the Robot Masters.

Despite his defeat, the concept of Yellow Devil would inspire further evil creations, including Chaos Devil and Ra Devil. The former was created by combining Yellow Devil technology with the creature Chaos in a cooperative effort between Wily and Dr. Eggman, Chaos being a native of Eggman's world. Ra Devil was created as an improvement upon Wily's design by Ra Moon, who sought to turn Wily's own work against him as the doctor had attempted to do by creating Ra Thor. Mega Man later faced an improved version when attacking Dr. Wily's newest castle.

Short Circuits
Prior to the Worlds Collide crossover event, Yellow Devil did not make an appearance in the Short Circuits series. During the crossover, however, he did appear in one of the Off Panel strips of the Sonic the Hedgehog series, in which he is seen talking to Tikal the Echidna, who attempts to convince him that violence is not the answer to his problems. He later returned in Worlds Unite in Sonic Universe #77's Off Panel strip, crammed in with various characters from Sonic the Hedgehog/Sonic Universe, Sonic Boom, Mega Man, and Mega Man X.

Mega Man Megamix
Yellow Devil is the large robot who stands guard within the main control room of Wily's fortress. His body parts are composed of an organic ferromagnetic polymer gel, and each part is controlled by a nucleus-like core. Changes in the magnetic field allow him to take on the distinctive Yellow Devil form. What appears to be his eye is the main core that controls his entire body. Wily believed Yellow Devil to be his greatest creation ever, but due to the fact that Yellow Devil's core could be disrupted by a strong electromagnetic pulse, Thunder Beam proved to be his ultimate weakness. All Yellow Devil can say is the letter "W".

After the defeat of Doctor Thomas Light's six Robot Masters in the story "The Birth of Mega Man", Yellow Devil holds Mega Man hostage as he meets Dr. Wily. Wily tries to convince Mega Man to join him, but as he refuses, he orders Yellow Devil to crush him. Mega Man manages to escape Yellow Devil's grip by using Guts Man's strength, breaking his arm, and then finish him off with a Thunder Beam.

Rockman (manga)
Yellow Devil appears in Wily's fortress. All he says is "Gururu".

Trivia

 * A glitch in the original release of the first game allows the player to quickly defeat Yellow Devil by shooting him with Thunder Beam and repeatedly tapping the pause button when it makes contact with him. Every time pause is toggled he will take a hit.


 * In the U.S., Yellow Devil's name was changed to "Rock Monster" in early sources due to a policy Nintendo had against religious references in NES games at the time.


 * Artist Ryan Jampole of the Archie Comics featured a modified Yellow Devil in part of a series of Halloween costumes drawn for Roll, in which Yellow Devil appeared as the Big Daddy to Roll's Little Sister from Bioshock.


 * Yellow Devil appears with several other characters on the cover of Mega Man #50; it is unknown if he will be featured in Worlds Unite.