Pokemon Ranger: The Road To Diamond And Pearl Catching Pokemon
You must first block the Pokemon from three sides and stand in the fourth side of it. Then, throw a Pokeball to catch it. You will not be allowed to keep the Pokemon throughout the entire game. You must release it after about ten battles or it will run away.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original