Remember the Oath 9 - Isaac
The former gym leader, koga, was a master of poisons, knowing how to wound or to heal pokemon._ "damn...like some kinda assassin?"
A Trainer's Tale - Chapter 18
"isn't koga one of the elite four?" jonathan asked suddenly. "that old fart? i thought he retired years ago. i got no idea, though." joy answered. i shrugged.
Luna and Thief Ch: 28
The voice asked as that ninetales got in closer "i've never seen a place like this, even when traveling with koga." _koga? who's koga?_ "where's your home?" luna replied to her inquisitively "is this your home?"
42. aura within
Later that night, ashton relaxed in his favorite chair while looking over some scrolls that master koga gave him long ago. he soon sighed to himself, "even though they are gone, the remnants of my friends remain in the form of text."
Earning His Title
You are a master of the koga style that has been passed on from master to pupil." iga sighs as his scaled body seems to shift a bit as he breathes deeply. "you always were diligent with your studies, but you never listen to the wind of life.