Ninja JaJaMaru-kun^[a] is anaction-platformvideo game developed and published byJaleco for theFamicom. It was released in Japan on November 15, 1985, and was ported to theMSX in 1986. The MSX version was released in Europe asNinja II, being marketed as a sequel toNinja-kun: Majou no Bouken, a game that used the nameNinja for its European MSX release.^[2][3]

Ninja JaJaMaru-kun
Japanese Famicom box art
Developer(s)	Jaleco
Publisher(s)	Jaleco
Platform(s)	Famicom Arcade MSX WonderSwan
Release	Famicom JP: November 15, 1985 Arcade JP: April 1986[1] MSX JP: 1986 EU: 1987 WonderSwan JP: April 15, 1999
Genre(s)	Platform
Mode(s)	Single-player,multiplayer
Arcade system	Nintendo VS. System

The game was a commercial success, selling nearly1 million units. Anarcade video game port for theNintendo VS. System was released in April 1986. A remake,Ganso JaJaMaru-kun, was released in 1999 for theWonderSwan.Ninja JaJaMaru-kun was released forNintendo's JapaneseVirtual Console on December 26, 2006, and in PAL regions on September 21, 2007, as part of Ninja Week for the Hanabi Festival promotion. It was released on the North American Virtual Console on October 22 the same year. The game was released on theNintendo Switch through theNintendo Classics service in May 2021.

InNinja JaJaMaru-kun, the player takes control of JaJaMaru, who sets out to rescue Princess Sakura from the pirate lord Namazu Dayuu, or "Catfish Pirate".^[4][5] JaJaMaru can run, jump, and throw shurikens at enemies, all of which are taken fromJapanese folklore and are introduced before a level begins.^[5] Each level has eight enemies total, who give chase to JaJaMaru if he occupies the same floor as them. Defeating enemies will cause their spirit to appear and ascend to the top of the screen, which can be grabbed for additional points. Once all the enemies are defeated, JaJaMaru moves onto the next level.

JaJaMaru can destroy bricks scattered in levels, some of which yield power-ups when destroyed. These include a cart that temporarily makes JaJaMaru invincible, a bottle that allows him to walk through enemies, a red ball that increases speed, coins that yield extra points, and 1UPs. Some bricks contain bombs which will kill JaJaMaru if he touches it. Collecting three different power-ups will summon a giant frog named Gamapa-kun, who JaJaMaru will ride and be completely invincible and be able to eat any nearby enemies. During levels, Sakura will sometimes drop flower petals that can be collected for points, while Namazu will drop deadly bombs. Collecting three petals will transport JaJaMaru to a bonus level, where he must throw shhurikens upward towards Namazu while avoiding his bombs. Bonus points are awarded for hitting Namazu, while hitting a bomb will send the player to the next level instead.

Ninja JaJaMaru-kun was developed and published byJaleco for theFamily Computer in Japan on November 18, 1985.^[6] The game is a spin-off ofNinja-Kid (1984), anarcade video game originally developed by Japanese company UPL, known for games such asAtomic Robo Kid.^[7] Jaleco had previously ported the game to the Famicom in early 1985, and decided to re-use the Ninja-Kid character for their own home console game, now namedNinja JaJaMaru-kun.^[7] The name is believed to come from the name of a character from the Japanese educational showOkaasan to Issho, who was named "Fukurokouji JaJaMaru".

ANintendo VS. System port was released by Jaleco for arcades in April 1986.^[1]Ganso JaJaMaru-kun (元祖じゃじゃ丸くん) is aremake ofNinja JaJaMaru-kun released in Japan on April 15, 1999, by Jaleco for theWonderSwan. It is an enhanced version of the original Famicom game with better control, though it uses monochrome graphics due to being an original WonderSwan game.^[8]

Ninja JaJaMaru-kun was added as a playable game to theNintendo Classics service in May 2021.^[9][10]

By April 1986, it had sold nearly 1 million units, becoming one of thebest-selling Famicom games.^[1] In Japan,Game Machine listedVS. Ninja JaJaMaru-kun on their May 15, 1986 issue as being the fifteenth most-successful table arcade unit of the month.^[13]

Digital re-releases ofNinja JaJaMaru-kun have received a mediocre reception.GameSpot criticized the game for its simplicity and lacking in its gameplay, which they attributed to the lack of variety between levels and for the intelligence of the enemies remaining the same as the game progressed.^[11] While they praised the game for its easy-to-know controls and good music for an early point in the system's life, they said that it was a generally unappealing-looking game and that its gameplay was tedious and boring, mockingly commenting: "Ninja Jajamaru-kun is tedious and ugly, and it actually induces physical discomfort. You'd have to be crazy to dole out six dollars to subject yourself to this kind of pain".^[11]Nintendo Life was more positive towards the game, saying that its simplicity actually made the game fun to play.^[12] In light of this, they criticized its high difficulty level and repetitive soundtrack.^[12] They commented that the game was worth the purchase simply for the fact it had previously remained confined to Japan, but warned potential buyers of its overly-high difficulty.^[12]IGN said that, while cute, the game was "quaint at best", and that its simplistic gameplay and lack of a true progression through levels would easily bore players.^[4] They also felt confused towards the game's high price point, which they stated was needlessly-high and made it difficult to recommend.^[4]

In a 2011 retrospective review,Hardcore Gaming 101 stated that whileNinja JaJaMaru-kun was a fun game, namely with the amount of ways to defeat the enemies, it suffered from choppy sprite animation and stiff controls, although claimed the latter was a significant improvement over the Family Computer port ofNinja-Kid.^[5] They said that it had several cute touches, such as the Catfish Pirate laughing at the player at the beginning of each level, and that the music, while repetitive, was catchy and memorable.^[5]Retro Gamer called it "a primative, challenging Japanese platformer which becomes a bore quickly", criticizing the game's controls, simplicity, and for the gameplay being boring and lacking in variety.^[14] They also wrote that its quality "has the feel of an NES arcade game port in a way", comparing it unfavorably to games likeGhosts 'n Goblins andSuper Mario Bros..^[14]

• Ninja JaJaMaru-kun atMobyGames