Stow-on-Side Stadium is the largest building in the town and is the site at which the fourth installment in the Galarregion's Gym Challenge takes place.
Gym Challenge
Gym mission
During the Gym mission, the player has to navigate sloped mazes while inside a spinning teacup. There are three courses in total.
The teacup naturally slides downwards, but the player can influence its movement by rotating the Control Stick in the direction they want the teacup to spin. Hitting a wall or obstacle can cause the teacup to lose momentum, but does not otherwise penalize the player. In the second and third course, there are several boxing glovesSw/ghoulish handsSh on springs against the edges of the course that launch the teacup away when it comes into contact with them.
At the end of each course, the player has to battle a Gym Trainer. Behind each Trainer is a warp tile that the player can use to return to the entrance, from where they can withdraw from their Gym Challenge. After completing three courses, the Gym mission is complete.
The player can withdraw from the Gym mission at any time by returning to the entrance. If the player loses a battle or withdraws, the mission is reset; however, defeated Gym Trainers cannot be battled again. Once the player has completed the Gym mission, even if they leave or lose, they proceed straight to the Gym battle from the reception area.
The player cannot use Pokémon Camp, Pokémon Box Link, or VS during the Gym mission or in the hallway before the Gym battle.
While pursuing Sordward and Shielbert, the brothers will use their stock of Wishing Stars to force multiple Pokémon from the Stadium to Dynamax against their will, causing them to rampage in the Stadium. The player will face a ConkeldurrSw/DusknoirSh with their party while Hop, Piers, and BeaSw/AllisterSh handle the rest.
Ash and Goh traveled to the Stow-on-Side Stadium in JN085 in preparation for Ash's World Coronation Series battle against Bea, and were soon joined by Korrina. The battle begun the next day.
The Stow-on-Side Stadium first appeared in PASS13, where Henry was the first one of remaining Gym Challengers to challenge it. During his match against Allister, Henry heard the voice of his deceased father talking to him from GigantamaxGengar's mouth. The match ended in Henry's clear victory, with Allister failing to defeat a single one of his Pokémon. Casey's match was initially delayed due to Allister running off to inspect Professor Magnolia's Sinistea and Polteageist, but she was eventually able to have it and win herself a Ghost Badge as well.
In PASS15, it was revealed that Allister and Bea take turns in leading the Gym and taking on Gym Challengers. In PASS18, Marnie revealed that, due to Allister having left the Gym after his battle with Casey in order to follow Casey and her friends, she had been forced to battle Bea instead. She had managed to defeat Bea and win herself the Fighting Badge, despite her Morpeko being at a disadvantage against Bea's Fighting Pokémon.
GalarianYamask is Allister's first known Pokémon. It was first used to battle Henry's Lancelot in a Gym battle, but was defeated. It is housed in a Dusk Ball.
Cursola is Allister's second known Pokémon. It was first used to battle Henry in a Gym battle. It managed to damage Henry's Lancelot, but was defeated by his Gunbain.
Gengar is Allister's third known Pokémon. It was first used in Allister's Gym battle against Henry, but was defeated by his Gunbain after its Gigantamax wore off. Allister also uses it as a mode of transportation. It is housed in a Dusk Ball.
