Since I was exploring the club, I decided to give a try myself too, so...
The character is inspired by Genji Shimada, from Overwatch, one of my favourite characters of all times. Not exactly the same, but...you know. The name took from him.
Name: Genji Alexos
Location: Magnas, 500 km from Alola's islands (obliviously, not real)
Class: Former Champion, Trainer
Main type: Fighting
Pheromosa (Toxicroak previously)
Gardevoir (Female, Fighting-Fairy, MegaEvolution achieved)
Brief story of Genji and his Gardevoir:
Genji Alexos was a normal guy like everyone, with the dream of becoming a strong trainer and the will of helping the others. At the age of 12, he found a strange colored female Ralts in a forest, where the little "gal" was attacked by a furious Poliwrath. After seeing the little Pokèmon using Mega Punch against the aggressive fighter, Genji took the chance to reach Ralts and taking her to a Pokèmon Center outside the forest, due to the Ralts having injuries in her body. After taking care of her, the Nurse discovered that the Ralts was the perfect result of a brutal experiment of some scientist of the region, where the little Pokèmon was infused with a Gallade's DNA, making her obtain strange colors, boost her physical attack and speed for the Special Attack stat, loose the Psychic Type and gain the Fighting Type. Despite the deep truth, Genji decided to stay with the Ralts until her awakening and, when it happened, Ralts wanted to follow the human who saved her. Genji and Ralts always spended time together, like best friends and partners, even in training. At the age of 20, Genji, alongside his fully-evolved Gardevoir, took the path of the Fighting Type-Master, stopped the scientists who tortured his best friend before they could harm other Pokèmons, and became Champion of his region, after obliviously obtaining every badge and defeating the Elite Four and the previous Champion. Due to the events in the near Alola region, one of the UltraBeasts, Pheromosa, went to the Magnas region and started to attack villages and people. Genji and Gardevoir managed to defeat the Beast, thanks to her discovering MegaEvolution and the value of her bond with her Master, and befriended it, after Pheromosa herself showed care towards Pokèmon and protected a Joltik from her own attack (I know Pheromosa has unspecified gender, but it acts always as female, so I give "her"). The beast joined the duo in their journey, after Genji decided to leave his role of Champion to travel the world to become stronger with his Gardevoir and help people who need a hand.
Genji's Gardevoir, inspired by Genji Shimada:
Physical Attacker, Speed Boost as ability (only Mega)
Gardevoir was a trusty partner in many games I played, included Rejuvenation, so I decided to make her as a Special Pokèmon.