The sixth Pokemon Gym in Pokemon Shield is found in Circhester, and its an Ice Type Gym. The Mission for this Pokemon Gym sees players having to navigate through tile puzzles full of trainers where various tiles will collapse when walked upon, sending you directly back to the start of the last platform you were on. When entering the Pokemon Gym, you will be given sensors that will help you get through the puzzles, vibrating as you get near a tile piece that will collapse. The further you make it, the longer the puzzles become. The final puzzle will even include a hail storm that makes it difficult to see.
Gym Trainer Lewis: Level 38 Snom
Gym Trainer Liana: Level 38 Cloyster
Gym Leader Alexander: Level 39 Beartic
Gym Trainer Micah: Level 39 Avalugg
After defeating the Mission, you will go on to face the Gym Leader, Melony. Like the Pokemon Gym, she is an Ice Type Trainer. She has four different Pokemon, and the final one she'll send into battle, Lapras, will have the ability to Gigantamax.
Gym Leader Melonie: Level 40 Frosmoth, Level 40 Galarian Darmanitan, Level 41 Eiscue, Level 42 Lapras
By defeating Melony, you will earn the Ice Badge. With it, you will have the ability to catch Pokemon up to Level 50. You will also receive TM27 (Icy Wind) and the Ice Uniform.
Now that you know about the sixth Pokemon Gym, Click Here to learn about the seventh Pokemon Gym you'll face!