Trevor: the Kalos rival who'd rather compare Pokédexes

A rival who almost never asks for a battle. Trevor is one of the five young Trainers of the Vaniville Town group, the Kalos hero included, and he plays the role of the serious student. His race isn't counted in Badges but in filled entries: he wants to complete his Pokédex before his friends, and he's the very one who puts the device in the player's hands.

Contents

• The Studious One of the Vaniville Town Gang
• The Boy Who Hands Over the Pokédex
• Two Battles, and Not One More
• Mega Evolution, a Mission That Wasn't His
• The Mobile Game, the Anime and the Cards
• Trevor at a Glance
• Frequently Asked Questions

The Studious One of the Vaniville Town Gang

Hailing from Lumiose City, Trevor first appears as one of the player's friends before joining the ranks of their rivals. He rounds out the Vaniville Town gang of five Trainers, alongside the player, Shauna, Tierno and Serena or Calem depending on which character you play.

His look is easy to remember: ginger hair that falls to his shoulders, a green T-shirt with a Poké Ball on one corner, black pants. The outfit is more schoolboy than fighter.

His personality follows the same lines. The game describes him as a studious and very curious student, who regularly scolds Tierno for not taking things seriously and thinking only about dancing, while admitting that he himself still has a lot to learn.

The Boy Who Hands Over the Pokédex

The first meeting takes place in Aquacorde Town, and it's worth more than a battle: it's Trevor who hands the player their Pokédex. The tool that will set the rhythm of the whole adventure, catch after catch, passes through his hands before reaching the hero's.

His entire ambition is wrapped up in that device. He wants to be the first of his friends to fill the Pokédex, and measures his progress by that counter rather than by the number of Badges won.

Hence a rivalry of an unusual kind. He battles very little and instead invites the player to compare their two Pokédexes: the rivalry is real enough, but it plays out on a stats sheet, not on a battlefield.

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Two Battles, and Not One More

The game takes this logic all the way. Trevor can only be battled twice from the start of the adventure to the end — a tiny total for a character counted among the rivals.

The first time, he doesn't even battle alone: it's a Multi Battle, in which he teams up with Tierno against the player and their rival. The second encounter is also the last, and this time it pits him against the player one-on-one.

Then there's the Battle Maison, where he switches back to the player's side. When the player chooses to team up with him, he fields a Tyrantrum and an Aurorus — his two co-op Pokémon, separate from the teams he uses against the player: a Pikachu and a Flabébé on Route 7, then a Raichu, an Aerodactyl and a Florges on Route 19.

Mega Evolution, a Mission That Wasn't His

The Kalos storyline eventually catches up with him. The assignment from Professor Sycamore — uncover the secret of Mega Evolution, become the best Trainer possible — clearly catches him off guard, and his reaction boils down to a single objection: what about the Pokédex?

He ends up embracing it in his own way, though. Once the Pokémon League is cleared, you'll find him in Geosenge Town, listing the other Pokémon capable of Mega Evolving: the generation's big new feature, treated like a checklist.

The rest of his life comes down to two addresses. He lives in Lumiose, near Jaune Plaza; later, another title doesn't show him on screen but mentions that he followed Professor Sycamore to another region to continue their research.

The Mobile Game, the Anime and the Cards

The mobile game long kept him as an extra before giving him a real role. He became playable there on September 16, 2024, in his canonical outfit and in a sync pair with a Florges.

His introduction there sums up the character better than any long portrait: a Trainer who traveled across Kalos to complete his Pokédex, described along the way as a shy budding genius with an answer for everything.

Other media treat him as a loyal supporting character. He's a recurring character in the anime's Kalos series, where he remains Tierno and Shauna's friend, and his first trading card came out in October 2014.

Trevor at a Glance

Frequently Asked Questions

• Who is Trevor in Pokémon X and Y?
  A Kalos Trainer from Lumiose City, the player's friend and one of the five youngsters who meet up in Vaniville Town. He's the one who gives the player the Pokédex, during their first meeting in Aquacorde Town.
• How many times do you battle Trevor?
  Only twice in the whole adventure. The first battle is a Multi Battle in which he teams up with Tierno against the player and their rival; the second pits him alone against the player, and it's the last.
• What Pokémon does Trevor have?
  In battle, he sends out a Pikachu and a Flabébé on Route 7, then a Raichu, an Aerodactyl and a Florges on Route 19; he fields a Tyrantrum and an Aurorus when the player teams up with him at the Battle Maison, and forms a sync pair with a Florges in the mobile game.
• What is Trevor's goal?
  To be the first of his friends to complete his Pokédex. He battles very little and would rather invite the player to compare their two Pokédexes than fight them.
• What happens to Trevor after the adventure?
  You'll find him in Geosenge Town once the Pokémon League is cleared, where he lists the Pokémon capable of Mega Evolving. Later, he's said to have left with Professor Sycamore for another region to continue their research.

In short

Trevor holds a special place in the gallery of rivals: he gives the player the item that structures the whole game, then steps back from the field almost entirely. Two battles all told, a Tyrantrum and an Aurorus borrowed for a co-op battle, and for the rest, Pokédex comparisons. His rivalry is measured in filled entries, not victories — and it ends offscreen, somewhere on the road with Professor Sycamore.