Here's why:
* Tempo is a random element: The tempo of each chamber is determined randomly when you enter it.
* No in-game mechanics to change it: There's no item, ability, or other in-game mechanic that lets you control the tempo of the Chambers.
What you can do:
* Save and reload: If you're not happy with the tempo of a chamber, you can save your game before entering, reload if you don't get the desired tempo, and keep trying until you get lucky.
* Focus on adaptability: Since you can't control the tempo, learn to adapt your strategies to different tempo levels. Some Pokémon thrive in slower tempos, while others excel in faster ones.
Remember, the random nature of the tempo is part of the game's challenge and adds to the strategic depth.