Gym leader

gym leaders
gym leaders are computer-controlled opponents who have a certain type of pokemon, for instance rock or grass. Players can battle gym leaders in the same way they battle regular players. The only difference is that, if the player defeats the gym leader, they recieve a badge, which goes onto their profile to show what gym leaders they have defeated.

Gym leaders on pokemon crater
All gym leaders are one of three different types:
 * kanto
 * hoenn
 * johto

All the gym leaders have also appeared previously in at least one pokemon game. For instance, kanto gym leaders appeared in pokemon blue, red, green and yellow. They also appeared in the second half of pokemon silver, gold and crystal, and in pokemon fire red and leaf green, which are remakes of pokemon green and red.

Johto gym leaders only appeared in the first half of pokemon silver, gold and crystal.

Hoenn gym leaders appeared in pokemon ruby and sapphire.

elite four
the Elite Four is a team of four professional pokemon trainers. They are much like gym leaders, except they have much stronger pokemon, often reaching level 100.