Colline Gym

The Colline City Gym, known as the Colline Gym, is the fifth Gym in the Tentin region, located in Colline City.

The Gym Leader is Pearl, and Trainers who defeat her receive the Pixie Badge and TM57 (Dazzling Gleam).

In The Light in Our Hearts, the Gym Leader is Xander, and Trainers who defeat him receive the Flare Badge and TM35 (Flamethrower). In order to proceed any further in the Gym however, they must have registered at least 35 "Caught" Pokémon in the Pokédex. It is recommended to visit the Safari Zone just next door if you are below the required number.

Similar to the Tauperock Gym, the Colline Gym varies between games. In The Light in Our Hearts, it is above a large lava pool with thin bridges built atop it. The player must use the pressurized steam released from the vents to cross the gaps in the bridge after defeating certain Trainers in the Gym.

In Tentin Redux, it is a house with multiple rooms where Trainers must be fought in order for the player to proceed through the Gym.

In Tentin Redux
Colline City Gym

Leader: Pearl

"A cutie that shines with pixie perfection!"

In The Light in Our Hearts
Colline City Gym

Leader: Xander

"Too Hot! Don't Touch!"

Trivia

 * The Gym Trainers in the Colline Gym in Tentin Redux make references to old Pokémon myths, these myths being Pikablu and the "Deoxys on the moon" myth.
 * In Tentin Redux, there is a reference to the Metal Gear series, as getting caught by the Gym Trainers causes the "Game Over" sound from Metal Gear Solid.
 * In The Light in Our Hearts, the way the player jumps across the lava using the steam is similar to how the player progresses in one section of Hotland in Undertale.