Like all other Gyms in Paldea, the Cortondo Gym building itself is simply used for registering Gym challengers. The Gym Test and Gym battle are both conducted at other locations within Cortondo.
Gym Test
The Gym Test of the Cortondo Gym is the Olive Roll, in which the objective is to roll a giant olive to the finish line. There are two shortcuts to the goal, blocked by optional Gym Trainers and rows of Smoliv. Defeating a Gym Trainer moves them and the Smoliv aside. The player is allowed to ride KoraidonS/MiraidonV during the Gym Test and use it to push the ball over the fence walls that make up the maze.
The player cannot use the Map, Pokédex, Camera, or any other D-Pad functions during the test. Pressing Y will instead ask the player if they want to quit the test. The player can save the game mid-test, but it will be reset (with the player, camera, and ball in their starting positions) after reloading the game.
After completing the Olive Roll once, it is temporarily unavailable until Katy is defeated. After defeating Katy, the Olive Roll can be repeated, although the layout will change to a more difficult one including ramps and vertical structures that can be fallen off of. It is not possible to repeat the original layout. The more difficult layout also tracks time and has the goal of completing it as quickly as possible; challengers can earn various picnic-related rewards depending on how much time was taken to finish. The target times are 10 minutes, 5 minutes, and 2.5 minutes.
During the Gym Test (the original layout), the field is surrounded by invisible walls and the player cannot jump or fall out of the area. However during the more difficult layout, the player is able to jump or fall out, which will reset everything to its starting position while a fade-out animation plays (costing the player time).
