Kalos and Mega Evolution
The Kalos Pokémon and the Mega Evolutions are drawn in the Black and White style, and Nintendo never made sprites like that past Unova. Fans did. Many of the ones in this game come from the X/Y Sprite Project on Smogon, led by Layell and princessofmusic.
Spriters: leParagon, TheAetherPlayer, Basic Vanillite, Larryturbo, princessofmusic, N-Kin, aXl, Layell, Wobblebuns, Quanyails, G.E.Z., TheCynicalPoet, RedRooster, Wyverii, Arkeis, Branflakes325, Noscium, Sleet, Legitimate Username, TrainerSplash, Bynine, GeoisEvil, paintseagull, Siiilver, Zermonious, Corson, Galifia, Farriella, MrDollSteak, TeraVolt, Dleep, WPS, Brylark.
Quality checks: Kyleo, Turtleye, Harrie, Antiant, Sphex, Ice-cold Claws, doomchaos, Luigi Player, Glustora, Tyrell D. Barnes, Kyuzeth, Arhops, Speed-X, Snivy101, with many of the spriters above.
Who drew which sprite is on the project's tracking sheet.
Some Kalos and Mega sprites, and the animations, come from a fan sprite pack that doesn't name its artists. If you drew one of them, message me in the support server and I'll add your name here.
Kanto through Unova
Pokémon from Kanto to Unova use the sprites from Pokémon Black and White. They belong to Nintendo, Game Freak and The Pokémon Company.
Battles
Every battle runs on Pokémon Showdown, and the trainers on the Circuit use its trainer sprites. Thanks to everyone who builds it.
Catch 'Em Cord is an unofficial fan project. It is not affiliated with, endorsed by or sponsored by Nintendo, Game Freak or The Pokémon Company. Pokémon and all related marks belong to their owners.