A pokémon trainer is a person who catches, trains, cares for, and battles with pokémon.

Many Trainers leave home at about the age of ten, sometimes accompanied with a starter Pokémon obtained from a Pokémon professor, such as Oak. Many will travel around one or more regions, doing such things as gathering information for a Pokédex, perfecting their technique, collecting badges, and working to become a Pokémon master. No matter what their specialties or aims, there is one code that they all follow - when two Trainers make eye contact, they must have a battle.

Pokémon Trainers come in all sorts of classes: Youngsters tend to stay close to home, and Bug Catchers swarm about the Bug-filled forests; Hikers traverse mountains and caves, and Ace Trainers aspire to compete in the Pokémon League. A Trainer's class may reflect their Pokémon of choice, the areas they prefer, their technique, and their level of skill; however, even among their classes, Trainers may vary greatly.

Many towns have a Gym run by a strong and experienced Trainer known as a Gym Leader. Other Trainers may challenge a Gym Leader, and if the Gym Leader is defeated in battle, he or she awards them a Pokémon League badge. However, the Gym Leader may award the Trainer a badge for other reasons, since the badge is a symbol of the Trainer's skill.

Above the level of Gym Leaders are the Elite Four Trainers and Pokémon League champions. There are also a special class of Trainers known as the Frontier Brains, but they are unique to Pokémon Emerald, Pokémon Platinum, and Pokémon HeartGold and SoulSilver and part of a privately owned institution known as the Battle Frontier, and so may not be recognized by the League. These Trainers are considered the cream of the crop, and can only be challenged if a Trainer has met requirements such as winning eight badges. Should a Trainer defeat other Trainers at this level, it is not uncommon for him or her to be offered a place in these high ranks.

However, just as there are many Trainers with noble goals and lawful methods, there are also corrupt Trainers, including a number of villainous teams. These Trainers often use powerful Pokémon to take what they want and further their plans.

-Definition from Bulbapedia

This question was asked about a week ago. :D

Oh...I did not know that. o_0 My bad.

Any other pokémon/princess questions that were asked before I put up more, may I ask?

I was sick and tired of Pokemon when it was still on TV. Will it never leave us alone?!