Pokemon Trainer Gladion

As you progress further in your journey, you will come across a mysterious trainer named Gladion and his Type: Null. He works for Team Skull when you first meet him, but as the storyline progresses, you will learn of his origins of being the brother of Lillie and son of Lusamine and Mohn. He is neither your friend nor rival, but he becomes more of the former by the end of the Main Story.

Gladion Encounters

Encounter 1 - Route 5: The first time you encounter Gladion is on Route 5, after him having just defeated Hau. He is upset that Hau didn't take battling seriously, and thus challenges you to a battle. After defeating him, he will explain how he is working for Team Skull.

Encounter 2 - Royal Avenue: When you participate in your first Battle Royal, Gladion will be one of your three competitors. He will choose to send his Type: Null into this special battle.

Encounter 3 - Route 8: The next time you see Gladion will be in the motel on Route 8. You will be told by the receptionist that someone has paid for a room for a long time in advance, which you will find is actually Gladion. He will tell you to leave if you try talking to him.

Encounter 4 - Route 13: When you reach Route 13 with Hau, Gladion will suddenly appear and tell you that Team Skull is looking for a Pokemon named Cosmog. He will ask if you know anything about this Pokemon, and Hau's behavior has Gladion feeling you do. He then will tell you to protect Cosmog at all cost, that though it isn't a strong Pokemon, it has the power to summon strong Pokemon to Alola.

Encounter 5 - Aether House: After defeating Guzma and Po Town and returning to the Aether House to find Lillie having been kidnapped, Gladion will become angry at you for not protecting her and Cosmog and will demand a battle. After defeating him, he will apologize and ask you to help save Lillie by going with him to Aether Paradise.

Encounter 6 - Aether Paradise: After arriving at Aether Paradise again, you will have to battle your way through Aether Employees to find Lillie, who can be found pleading with Lusamine. It is here that you discover that Gladion, Lillie, and Lusamine use to be a family, and how Lusamine is looking to use Cosmog to create a Wormhole in order to stop Necrozma all on her own. After ultimately must facing Lusamine, she will still use Cosmog to summon a wormhole. Lusamine and Guzma will then go into Ultra Space, as Cosmog has now changed Forms (actually evolved into Cosmeom). The following day, Gladion will give you one of the Flutes to help summon the Legendary Pokemon of The Alola Region, in hopes that it will help you get to Ultra Space to find Lusamine. He will then take you and Lillie to Poni Island, hoping their Kahuna can help you find the other flute.

Encounter 7 - Mount Lanakila: After defeating both Necrozma and your Island Challenge, Gladion will appear at the base of Mount Lanakila as you head towards the Elite Four. He will challenge you to another battle, ultimately telling you that even though you aren't really friends, you are still far from rivals. After defeating him, he will tell you that Lillie and Nebby can be found back on Mahalo Trail.

Encounter 8 - End Credits: During the End Credits, you will see Gladion leaving for the Kanto Region.

Encounter 9 - Pokemon League Rematch: One month after first defeating the Pokemon League, there is a chance that Gladion will appear to challenge you for your championship should rematch the Pokemon League. He will attempt to show you what he has learned in his yet newest travels.

Encounter 10 - Aether Paradise: After defeating Gladion in the Pokemon League, you can find Mohn in Aether Paradise. After a short conversation between him and his wife Lusamine, who Mohn has no idea he had a family with after his encounters with an Ultra Wormhole, Gladion will appear and ask his mother if she is okay with leaving things how they are with his father. Since Mohn seems happy, Lusamine is fine with how things stand.