Donkey Kong Jr. (game)

Donkey Kong Jr., also spelled Donkey Kong Junior in early arcade releases and home ports, is an arcade game starring Donkey Kong Jr. It is the direct sequel to Donkey Kong, and it and the similar Donkey Kong II, as well as Donkey Kong Circus are the only games in the Mario franchise where Mario is the antagonist. Donkey Kong Jr. never enjoyed the sales or the following that the original Donkey Kong did, but it did well enough to warrant a second sequel, Donkey Kong 3.

Story
After the events of Donkey Kong, Mario has captured Donkey Kong as revenge for kidnapping his lady friend and Donkey Kong Jr. has to save him. Donkey Kong Jr. will travel through four stages from the jungle to the big city to rescue his father, climbing vines, avoiding enemies and jumping on platforms along the way. However, every time Donkey Kong Jr. gets close to freeing his father, Mario just pushes him further away.

Finally in his hideout, Mario appears to be atop a skyscraper similar to 100m from the last game. Donkey Kong Jr. has to put six keys into their keyholes to free his dad and make the platform they are standing on disappear. Donkey Kong and Mario both fall down and Donkey Kong Jr. catches Donkey Kong but Mario just hits the ground. Donkey Kong Jr. carries his dad off-screen as Mario gets up and runs after them, only to be kicked right back out by Donkey Kong, forcing him to flee. In the NES version, this is altered to Mario falling to his apparent death.

Story from the Nintendo 3DS Virtual Console manual
"''Poor Donkey Kong™ has been captured by Mario™ and now finds himself locked up in a cage! It's up to Donkey Kong's son, Junior, to rescue him by snatching the keys to the cage away from Mario. Unfortunately for Junior, Mario won't give up those keys easily, and dangerous snapjaws, nitpickers, and sparks will attack him along the way. Will Junior be able to help his father...? That all depends on you!"

Gameplay
As a direct sequel, Donkey Kong Jr. retains many elements from Donkey Kong, although the two games are significantly different. While the original installment took place in a construction setting, Donkey Kong Jr. takes place in a jungle-like setting, from which Donkey Kong Jr. can climb up vines, drop fruit, or jump from place to place.

In order to free his father, Donkey Kong Junior must collect the key being kept at the end of each level, eventually using those keys to free his father in the end. All the while, however, Mario will sit near the Key as well as Donkey Kong's cage, summoning waves of monsters after Donkey Kong Junior from his position. After Donkey Kong gains a key, Mario will take Donkey Kong to the next location.

Levels
In the Japanese arcade version, the stages follow each other in each other in the same order for every loop.
 * Stage 1
 * Stage 2 (not found in the port)
 * Stage 3 (not found in the and  ports)
 * Stage 4

In the international arcade version, the middle stages are only revealed during the second and third loop with the fourth loop onward matching the Japanese version. The, ColecoVision, , and Intellivision ports follow this progression. The Atari 2600 port put Stage 3 after Stage 4 for every loop.

Killscreen in Level 22
Like its predecessor, this game also has a killscreen on level 22 based on the same integer overflow glitch.

Re-releases
Donkey Kong Jr. was re-released in several other forms for different game systems.
 * It was ported to various non-Nintendo home consoles such as the Intellivision, Coleco consoles, and Atari consoles during the 1980s.
 * Donkey Kong Jr. was released on the Nintendo Entertainment System as part of the Arcade Classics Series, along with Donkey Kong Classics and Donkey Kong Jr. + Jr. Sansū Lesson but the latter lacks stages 2 and 3. The NES port has been re-released many times starting with the FDS in 1988. In 2002, the NES version was re-released under the title Donkey Kong Jr.-e for the e-Reader as part of Series One. The NES version is also available as a Virtual Console title for the Wii, Nintendo 3DS, and Wii U, with the Nintendo 3DS version also being a part of the 3DS Ambassador Program. The NES version is also a part of the group of games in the NES Classic Edition system. This version was again made available on the Nintendo Entertainment System - Nintendo Switch Online service on May 15th, 2019.
 * Donkey Kong Jr. was remade into a Game & Watch game under the same name, which was later a part of the Mini Classics series, and later receiving a port onto the Nintendo DSi. The Game & Watch version is also a part of the minigame collection in Game & Watch Galleries 3 and 4, with both a regular and modern version.
 * The arcade version was re-released in North America in 2004 as part of compilation arcade cabinet Donkey Kong/Donkey Kong Jr./Mario Bros. On December 21, 2018, it was re-released for the first time on a home console as part of 's Arcade Archives brand on the Nintendo Switch's eShop.

References in later games

 * Donkey Kong and Mario vs. Donkey Kong: Donkey Kong Jr., as well as many enemies and gameplay elements, make an appearance in this game (with Donkey Kong Jr. only being in the former). Also, Mario's method of trapping Junior in Donkey Kong '94 is identical to Donkey Kong Jr.'s method of freeing his father from captivity. Many enemies and gameplay elements from Donkey Kong Jr. are reused in Mario vs Donkey Kong as well.
 * Donkey Kong Country series: Diddy Kong and Dixie Kong's ability to climb two ropes at a time originates from Donkey Kong Jr. The music for this game is redone and replayed in the Golden Temple level of Donkey Kong Country Returns and Donkey Kong Country Returns 3D. A different cover of the song plays in the Secret Seclusion world in Donkey Kong Country: Tropical Freeze. The plotline for Donkey Kong Country 2: Diddy's Kong Quest was also very similar to Donkey Kong Jr., including Donkey Kong being captured by an old enemy (in his case, Kaptain K. Rool) and requiring that Diddy save him by traveling to the place Donkey Kong was being held captive.
 * Super Mario Kart: Donkey Kong Jr. appears as a playable character in this game.
 * Super Smash Bros. Melee: Donkey Kong Jr. appears as a trophy in the game, and his antagonism towards Mario is referenced in the flavor text for the trophy.
 * Super Smash Bros. Brawl: When Diddy Kong, Fox, and Falco arrive at the barge taking the recently-trophified Donkey Kong to the Ancient Island, Donkey Kong's trophy is shown in chains on the arms and legs, referring to Donkey Kong's captive status in the game, particularly the final level of the game.
 * Castlevania: Order of Ecclesia: The lightning trap room where the Vol Fulgur glyph is found is similar to Stage 3 of Donkey Kong Jr. and was most likely based on that stage.
 * Super Smash Bros. Ultimate: Donkey Kong Jr. appears in this game as a spirit. Additionally, a medley of songs named "Donkey Kong / Donkey Kong Jr." is featured.

Produced by

 * Gunpei Yokoi

Original Music by

 * Yukio Kaneoka

Programming by

 * H. Hoshino
 * Shigeru Miyamoto
 * Yoshio Sakamoto (Logo graphic)
 * Kenji Nishizawa

Pre-release and unused content
The arcade version includes an unused lightbulb object as well as several graphical leftovers from the original Donkey Kong. In addition, the Coleco Adam port is notable for originally featuring an unlockable stage, but it was cut at Nintendo's request.

Sales
After the fiasco involving Crazy Kong, Nintendo decided not to license production of the arcade version to other companies and not to sell printed circuit boards but only whole machines. A private showing of the game was held on July 28, 1982 before its rollout the following month.

According to The Ultimate History of Video Games: from Pong to Pokemon and beyond...the story behind the craze that touched our lives and changed the world, the arcade version of Donkey Kong Jr. sold 30,000 units in North America, half of its predecessor.

Trivia

 * During the intro of the arcade version of Donkey Kong Jr., there were actually two Marios seen carrying Donkey Kong's cage away. This second Mario was possibly the basis for Luigi.
 * Most versions of Donkey Kong Jr., including the NES version, had the ending theme played once instead of twice. The three versions to break this rule were the Intellivision, Coleco Adam, and Atari 8-bit computer ports.
 * In the arcade version of the game, between the second and third stages, Mario carries Donkey Kong away in a yellow helicopter, with Jr. following close behind with a parasol.