CHOP D is not exactly a kaiju, because he is a mythological creature, a dragon, but he joined L.A Kaiju FAM willing to improve his karate skills, as he was promised he would get to fight formidable foes while being a member of the FAM. When he's not fighting in actual combat, he's always training.
What the hell is L.A Kaiju FAM? L.A Kaiju FAM (Los Angeles Kaiju Family) is a mafia, a gang if you want, formed by Kaijus (japanase term for big and weird monster) from all over the world. They have fun bullying cities and making heroes suffer and if someone mess with them, they just destroy his city and eat up the whole population. They have their headquarters somewhere in Los Angeles. Nobody can explain how their location hasn't been discovered yet, considering their size!