|Director(s)|| Masataka Takemoto|
|Genre(s)|| Side-scrolling platformer|
|October 23rd, 2018|
|Composer(s)|| Shiho Fujii|
|Predecessor||New Super Mario Bros. U|
|Media Included||The V² optical disc|
|Max. amount of players||4|
As mentioned above, Koopalings X explores the adventure field and ditches plain platforming, wanting to give the player different feels of the various characters and to explore the levels in different ways. Taking inspiration from Nintendo's The Legend of Zelda series, Koopalings X features dungeons and puzzles, and taking some inspiration from Sega's Shadow the Hedgehog, level paths are non-linear and the player can choose whatever levels and whatever exits to get through the game with. Players can find various treasures to get coins and weapons and power-ups, and even enhancements to scepters.
In even greater difference to the Super Mario franchise, and more similar to the Mario RPG franchises, Koopalings X contains a more in-depth plot. The plot starts with Bowser being captured by a few elitists while the Koopalings were off plotting to take over Sarasaland. Following Kamek announcing his capture before he was swiped away too, the Koopalings immediately set off to retrieve Bowser, although find it increasingly tricky as the elitists keep shifting their headquarters from location to location. Along the way, many things occur to set the Koopalings back from their success.
Reception has been (TBA).
Koopalings X shares a lot of gameplay characteristics with the usual 2D Super Mario sidescrollers. The player must run through the levels and reach their exits, and conquer every land and its lord. Level designs attempt to remain as faithful to the original series' as well. Beyond these similarities, the changes are rather radical in size, the game's levels are much like dungeons and have multiple pathways to explore, and hide many secrets and shortcuts. The game has a survival-like system, the player runs on typical heart meters instead of the usual power-ups based system and must use a multitude of diferent attacks to combat different foes.
Gameplay of Koopalings X makes greater use of characters' abilities than the mainstream games do, giving all the individual Koopalings and Bowser Jr. different statistics and movepools. Some Koopalings have more power than others and can enter different passageways, but some Koopalings are more quick and nimble and can climb real high. Each Koopaling has the same scepter that they use in the games, but the player can select between different effects for the weapons, able to use damaging magic, custom platforms, bombs, and more from the weapons. Scepters can have effects switched at Clown Car Stations.
Instead of the linear layouts of levels, levels are very dungeon-like, containing several rooms and passages, allowing the player to explore. The reason for this design is to tempt players to look around for treasures (like new scepter effects, new items, new weapons, and even stat boosts) and different exits to levels. Worlds have "choose your own adventure" style, players can exit levels in different ways to enter totally different levels. All levels have general themes explored in the Super Mario series (such as grasslands), but each has a different twist to them to separate them from other levels. Like with Super Mario 3D World, all levels are named.
Most levels allow use of all Koopalings, but some levels are designed for only a few specific Koopalings and some levels have sections that can only be crossed by certain Koopalings. To remedy this, Clown Car Stations are set up in the levels for the player to access. When the player stops by one, they can swap out their current playable character for another one. Red lines are often found next to Clown Car Stations, and will zap the Koopalings that aren't permitted to cross it. They also serve as checkpoints, and heal a Koopaling slightly when touched. If the player loses a life, they return to the previous Clown Car Station.
Koopalings X hosts nine playable characters, each one with different statistics and abilities. Said characters are Bowser's seven Koopalings, his true son Bowser Jr., and one of the antagonistic elitists, Velo.
Koopalings X hosts eight worlds for the player to blast through, and four bonus worlds. Each world focuses on a different theme, with multiple levels focusing on different elements of their world's theme. As the player progresses through the game, the levels become harder and things toughen up, and more hazards and obstacles are featured. Unlike most Mario-related titles, levels are very non-linear and often have more than one exit.
- Koopa Kingdom: A simple lava-themed world with magma chambers, jail-like dungeons, and tower-like buildings. Some areas look fragile and could collapse at any moment. The Koopa Kingdom is a rather misleading name for this world, as there are several different "Koopa Kingdoms" for the player to pass through, including some of Bowser's old ones.
- Wild West: The second world that isn't too far from the Koopalings' homeland, being based on typical arid deserts and stereotypical cowboy tales. The Wild West features canyons, small forests, an oasis, and underground water chambers. This world has much more hostile creatures than the Koopa Kingdom does, as none of the enemies here are affiliated with Bowser's forces.
- Rocky River: This wild and winding river is very difficult to navigate, featuring a wide variety of hazards that can slow down the Koopalings. Rather than going down, however, the Koopalings have to fight against the water's currents, moving upwards when possible. There aren't many underground sections, and those that exist are commonly submerged.
- Murky Mines
- Tundra Township
- Chaos Carnival
- Fissure Forest
- Stronghold Siege
Shiho Fujii and Mahito Yokota, the main composers for New Super Mario Bros. U, returned to compose music for Koopalings X, although combine the Mario-atmosphere music with exploration or dramatic moods to fit the atmosphere of the game. Mollete Apoderade, a composer emerging from a site for Nintendo fangames, became one of the project's primary composers, and created primarily the battle and bonus themes, as well as the game's general SFX. Most of the music tries to take "epic" takes on all of the respective themes, but tries to keep them in line with the Mario series as much as humanly possible.
- This is currently the latest reversion of Athena's first project on Fantendo, named Koopalings Universe. Before this version, it went under several names, most notably Koopalings Dream.
- The name "Koopalings X" is actually a reference to what was intended to be a sequel to the original Koopalings Universe, named "Koopalings Z".
- Despite the presence of set personalities for the Koopalings given in Mario & Luigi: Paper Jam and Paper Mario: Color Splash, the Koopalings mostly take their personalities from the DiC cartoon The Adventures of Super Mario Bros. 3 and the following cartoon Super Mario World.
- While the game itself takes many obvious references from its home franchise, Mario himself does not make an appearance outside of cameos.
- During its cycle of development, Koopalings X was going to be a spin off Super Mario title where you could go through eight worlds to stop Wart's army from taking over the Mushroom Kingdom. You could play as several characters in that game, including Wario, Rosalina, and even Bowser. However, the development switched over to being a Koopalings game following mass popularity with them, including their appearances in a Super Smash Bros. title and their presence in a Mario Kart title, and their ever growing presence in non-mainstream products.