From Bulbapedia, the community-driven Pokémon encyclopedia.

Rald is an experienced young Pokémon trainer. He meets Enta and ends up becoming the energetic young boy's teacher, but refuses to go easy on him in battles. He is a character in Pocket Monsters Emerald: Challenge!! Battle Frontier.

Rald is based on Brendan and his name is a shortening of "Emerald".

Pokémon

Sceptile

Charizard

Gyarados

Manectric