Regan's Lucario

This Lucario is a Fighting/Steel-type Pokémon owned by Regan. It was given to her as her first Pokémon by her father when she was a child and when Lucario was a Riolu. Lucario is her partner pokemon and it also has the ability to Mega Evolve.

As Riolu
When she was a young child, Regan was given a Riolu for her birthday. The two grew up together and became very close. Even as a young child, Regan dreamed to mega evolve her Lucario as her farther does with his own Pokémon.

As Lucario
Sometime prior to the first episode, Riolu evolved into Lucario. Upon evolving, Regan and Lucario remained friends and eventually the two set off on a journey to obtain Lucarionite so that Lucario could mega evolve.

The Journey Begins
Lucario is first seen briefly in a flashback as a Riolu being given to Regan for her birthday. More flashbacks show the two growing up together greatly admiring Regan's father and his stories of battling and mega evolution. In the present time it is Regan's thirteenth birthday and also the day Regan planned setting off on her own journey. Both Regan and Lucario are shown to be very excited and ready to set off on the journey. At about Noon, Regan gathers the bag she's packed and is nearly ready to leave when Jonathan pulls her and Lucario to the side. He gives suggest they stop at Sycamore's Lab. When Regan asks why he responds that there are essentials for any beginning trainer that can be picked up at the lab, including a starter Pokémon. He tells her that she will need a full team to accomplish her goal then adds that he will give her a head start now as he gives her a bracelet with a keystone. Ecstatic, Regan thanks her father and asks where she might find Lucarionite, he responds by telling her that finding it is the purpose of her journey and that she will find it when both her and Lucario are ready. Regan hugs her father in appreciation and after a final farewell to her parents Regan and Lucario set off to Sycamore's lab. When they arrive at the lab, Regan is greeted warmly by Professor Sycamore. She tells him she's here to pick a starter Pokémon and the professor obliges by calling out the available starters. After considering all the options, Regan ultimately decides to chose a Froakie.

Personality
Due to the amount of years spent together Regan and Lucario have a very close bond and are even shown to have a similar personality as well.

Like Regan, Lucario is determined and stubborn.

Gallery
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Trivia

 * Lucario is arguably Regan's strongest Pokemon.
 * It is heavily implied that Lucario is the offspring of Jonathan's Lucario.