Chief and Gypsy

Chief and Gypsy are a Shiny Greninja and a normal colored Greninja respectively. They are the parents of Ash's Greninja.

Personality
Chief: Since he and his trainer work as cops, Chief is very serious and strict when he's in his job. However, when he's not working as a cop, he's a good father and friend, and a great Pokémon to talk to. Though sometimes, he can't help but feel guilty to see that he acidentally left Gypsy to take care of an egg, and guilty to see that Gypsy discounted it on their son. However, he decided to leave the past behind and be there for his son as much as he can.

Gypsy: Sweet and caring. However, when Chief was taken away from her before she finds out she got an egg with her, her personality changed drastically. She would often call Greninja as a Froakie inside his egg nasty names, and even left the egg in the woods to die. However, Gypsy managed to learn it from her mistakes, and apologized to Greninja before she takes her last breath.

Backstory
Chief and Gypsy met each other as two wild Froakies. They were really great friends back then, and then, when they evolved into Frogadiers, they fell in love.

After being together for so long, Chief was caught and captured by a German Shepherd named Pongo, not long before Gypsy finds out that she was pregnant with his egg. Because of that, she started to insult the egg in order to discount the anger that she felt for Chief leaving her. And not long after, Gypsy was caught by an ostrich named Lindsey, who left her egg behind afterwards.

Many years later, Chief and Gypsy were still away from each other. Chief was working as a police Pokémon at the Anistar PD, and Gypsy was living a normal life, until she was diagnosed with the high state of leukemia. And unfortunately, she ended up dying, but not before apologizing to her son, Ash's Greninja, for the way she treated him back when he was inside his egg..

A couple of months after Gypsy's death, Chief, along with his trainer, found his son and managed to explain his story. And now, father and son left their past behind, and Chief and Greninja talk to each other when they have time.

Trivia

 * Gypsy died of leukemia.
 * Chief works at the Anistar PD.
 * Chief lives along with Pongo in an apartment. Pongo is aging like humans do.
 * Neither Chief or Gypsy know their real parents, as when they hatched, none of their parents were around.
 * Chief likes to visit his son when has the chance. He even goes to visit his grandkids (Froakie and the Fennekin twins) later in the Next Gen.