Tierno and Trevor

Tierno Paulin Rikimaru and Trevor Renaud Suguro are two friends from the Kalos region. Tierno is from Santalune City and Trevor is from Lumiose City. They're good friends of Shauna Summers. Tierno's main Pokémon is his Blastoise, while Trevor's is his Charizard.

Present
Tierno and Trevor were first seen in Episode 9 at a diner in Dendemille Town, Kalos. They were there with Shauna and the three of them met Alain, Ash, and Dawn, who were traveling with Clemont, Bonnie, and Serena. That latter group was there to take a break while on their way to Anistar City. Tierno, Trevor, and Shauna recognized Alain from the news segment he had filmed a while back.

After introductions, Shauna wanted to travel with the gang on their journey to get more Plates, but they declined, since they had a big fight coming up for a Plate in Anistar City. They said she could come after they get the Plate, though. Tierno and Trevor couldn't come, because of an upcoming dance performance and art competition, respectively, for the two to participate in.

Tierno and Trevor later reappeared in Episode 11, seeing off Shauna as she started her journey with the Mokusetsu.

Personality
Tierno is a dancer and is full of energy. He can move pretty well and always keeps people in good moods. He's pretty outgoing, similar to Shauna.

Trevor is a photographer and may be seen with his camera at times, taking in what he sees. He's the quietest between him, Tierno, and Shauna, but is still kind and doesn't mind making new friends.

The two support Shauna in what she does as well, just as the same is reciprocated. They have confidence that she'll stay safe, even when traveling with the Mokusetsu.

Tierno

 * His first name, Tierno, is his name in both the Japanese and English dub of the Pokémon anime. It's Spanish for "tender".
 * His middle name, Paulin, was randomly picked from a name generator.
 * His last name, Rikimaru, was also randomly picked from a name generator.

Trevor

 * His first name, Trevor, is his name in the English dub of the Pokémon anime. It's possibly from "trouver", French for "to find".
 * His middle name, Renaud, was randomly picked from a name generator.
 * His last name, Suguro, was also randomly picked from a name generator.

General

 * Tierno's birthday, October 11th, is the United States air date of the episode of the Pokémon anime he first appeared in. Note that Shauna's birthday is the Japan air date of that same episode.
 * Once picked, Trevor's birthday was decided to be the day after Tierno's, October 12th, to make Tierno one day older than Trevor, a sign of how close the two are.
 * In this series, Tierno, Trevor, and Shauna all have the fully evolved forms of the Kanto starters.