Unlike the previous games, Pokémon X & Y starts out with a substantial cast of supporting characters, all of whom will help you in your journey.

Professor Sycamore
US Name: Sycamore
Jp. Name: Platane

Professor Sycamore is the professor who sends the character and their friends out onto their journey. He is first met within Lumiose City. Unlike most Pokémon Professors, Sycamore will even challenge you to a battle from time to time

Calem & Serena
US Name: Calem & Serena
Jp. Name: Calem & Serena

Calem & Serena are your next door neighbours in the game, and their appearance is that of the opposite gendered trainer to the one you select in the game. Throughout the game, they shall battle you in order to test your skills. They have a passion to become a powerful Pokémon Trainer and sets out on the journey to accomplish that dream.

Shauna
US Name: Shauna
Jp. Name: Sana

Shauna is one of three characters who live close to you in Vaniville Town. She is an incredibly energetic girl who is coming along on the journey to find a dream of her own. She’s friendly and outgoing, and seems to genuinely enjoy all the curiosities you’ll come across on your journey.

Tierno
US Name: Tierno
Jp. Name: Tierno

Tierno is one of three characters who live close to you in Vaniville Town. He is a caring guy and is intent on using his Pokémon to make the best Pokémon Dance team. Strong, kind, and light on his feet, Tierno gets easily distracted by watching opposing Pokémon during battles because he’s too busy trying to incorporate Pokémon moves into his dances.

Trevor
US Name: Trevor
Jp. Name: Trevor

Trevor is one of three characters who live close to you in Vaniville Town. He is incredibly curious about the world and is a fantastic student. He gives you the Pokédex and is eager to compare and compete with everyone so that he finishes his first

Alexa
US Name: Alexa
Jp. Name: Pansy

Alexa is the elder sister of the Santalune City Gym Leader, Viola. She is an aspiring journalist and works at a publishing house in Lumiose City

Diantha
US Name: Diantha
Jp. Name: Kalne

Diantha is a very popular star in the Kalos region and you will often bump into her in various circumstances. As she is also a trainer, she will battle you on occasion and event trade with you should the need arise. She interestingly has a Key Stone, used for Mega Evolution, in her necklace

 
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