Spiral Mountain (クルクルやま, Spiral Mountain) is a downloadable stage in Super Smash Bros. Ultimate. It is bundled with Banjo & Kazooie as part of Challenger Pack 3 and was released on September 4th, 2019.
The main platform is the peak of Spiral Mountain. After a warning signal, the plane of gameplay rotates around the center of the mountain, changing the overall layout of the stage and causing characters and objects on the spiral pathway to be pushed up or down. Wooden platforms and floating patches of ground occasionally appear in the various layouts. Bottles, Mumbo Jumbo, Tooty, Buzzbombs, the Jinjos (which come in groups of one to five), and Gruntilda appear as cameos on this stage, with Gruntilda flying in the background on her broom. Various objects from the original game, such as Extra Honeycomb Pieces and Extra Lives, can be seen in the background, with almost identical placement to that seen around the Mountain in Banjo-Kazooie.
Ω form and Battlefield form
The Ω form and Battlefield form are set on top of the mountain similarly to its regular form; however, in both forms, much of the mountain is now gone, with the main platform acting as an island floating high above the moat. The stages are also resized and reshaped to match Final Destination and Battlefield, respectively. The three soft platforms of the Battlefield form are also based on the wooden platforms of the normal form. The background characters still appear and the background still rotates (although the arrows and sound indicating rotation are gone), but since the stage is a flat circle, this does not interfere with gameplay.
With hazards off, the stage doesn't rotate, and stays in its initial form. At the start of a match, the layout features two platforms, one on each side of the stage. These platforms float and go away after a certain amount of time, and never return.
Spiral Mountain is the starting area in Banjo-Kazooie and every other game in the series afterwards. Banjo's house is located at the foot of the mountain, and Gruntilda the witch resides in a lair near its peak, connected via a rope bridge. In the first game, it serves as a tutorial area, where Bottles the mole teaches Banjo and Kazooie some basic abilities to prepare them for their adventure. The duo can explore around the mountain, find a set of Extra Honeycomb Pieces and some extra lives, and fight the mountain's living vegetation before heading into Gruntilda's Lair.
In Banjo-Tooie, Spiral Mountain has been trashed by Gruntilda's minions just after her departure; many chunks of the landscape have been broken off and litter the ground. The bridge to Gruntilda's Lair is broken off, and its inside has partially collapsed; only the initial lobby, occupied by Cheato the spellbook, is accessible. The top of the spiral also has a Flight Pad, letting the pair explore more of its surroundings, including a waterfall cave.
In Banjo-Kazooie: Nuts & Bolts, Spiral Mountain is overviewed and briefly explored in the prologue before Banjo, Kazooie, and Gruntilda warp to Showdown Town with the Lord of Games. The duo return there for the final boss fight against Gruntilda, and stay there after their adventure ends. A significant portion of the upper cliffs is able to be explored, though it is simply more land rather than anything of interest.
The design of Spiral Mountain and its surrounding area in Ultimate is largely based on its appearance in the original game, as the bridge to Gruntilda's lair is still open and the landscape is unscathed. There is also some influence from its appearance in Nuts & Bolts, particularly with regards to its color palette and the geometry of various locations, such as the mountain itself. In particular, the design of Banjo's house is a mixture of its more detailed appearance in Nuts & Bolts — including Banjo's name written on the door — with its original, undamaged appearance in the first game. Just like in the original Banjo-Kazooie, an Extra Life statue is hovering above the chimney and behind the waterfall.
The characters that cameo in the background each play an important role in the series: Gruntilda serves as the main antagonist of the series, causing trouble for Banjo and Kazooie; Tooty is Banjo's younger sister who gets kidnapped in the first game by Gruntilda; Jinjos are collectible creatures who were kidnapped and thrown into the different worlds in the first game, and forced out of their village in the second game by Gruntilda's drill; Bottles is an intelligent nearsighted mole who teaches Banjo and Kazooie new abilities in the first game prior to his death at the beginning of the second; Mumbo Jumbo is a shaman whom Banjo visits to be transformed into various creatures and objects to help him access more Jiggies; and Buzzbombs are enemies introduced in Bubblegloop Swamp, with one lone Buzzbomb making an appearance in the intro movie to Banjo-Kazooie.