According to Gamelio's account, he actually had known the Green Demon for a long time.
In a strict sense, Gamelio's achievements today were indeed thanks to the Green Demon.
At that time, Gamelio had just begun to make a name for himself, still following his older brother. Although his career had not taken off dramatically, he had gathered his own small following.
However, this guy's ambition was indeed enormous; he was not content with his status at the time. After much internal struggle, he was finally overtaken by his ambition and devised a rather bold plan.
He decided to betray his own boss!
Back in the slums, the battle raged on for a long time. Although Gamelio had prepared extensively, his boss, having been in the game for so long, could still give as good as he got, even just by living off his former glory!
And in the end, Gamelio became just that—half a catty.