Cole

Cole is Vergil's best friend and fellow trainer. Over the course of the series, Cole will realise he wants to become a scientist. At the end of the kanto series, Cole stays behind and becomes a team rocket member, wishing to become a stronger trainer and better scientist

Tauros
During their trip to safari zone, and while there was a ban on hunting pokemon there due to their low numbers from the curse, Tauros is defeated in battle by another Tauros and is wounded. Cole and Vergil take care of it, and Cole befriends it. Cole also asks Tauros if he wants to join them on their trip and get stronger. Tauros accepts, and the rangers allow for Cole to take Tauros along, as its life would be in danger in the safari zone.

Melloetta or Diancie
One of the above will hatch from the egg received during the pokemon theme park arc. It ισ a reincarnation of the original unique legendary pokemon, but considered to be a different individual at the same time, as it possesses none of its memories from its old life.

Blaziken
Blaziken is one of Cole's best pokemon. He catches him when Blaziken is fully evolved, as Cole gets its respect by beating it in a match. Blaziken has the speed boost ability, which lets it become faster as time progresses during a fight, and lands very powerful kicks. It throws fire out of its palms, allowing it to charge forward and launch itself in the air, giving the impression that it is flying. It knows blaze kick (a kick after it has enveloped its legs into fire), flame bird (using wings made entirely out of fire, it hurts itself too by using this), Sky Uppercut and Hyper Beam