>>48610934Korrina's Lucario is more similar to Ash's Pikachu, he's her best friend and he just wants to be next to his trainer.
Ash's Lucario is a battleautist, he doesn't give a shit about friendship* and he's only focused on being the very best, he's like an incarnation of OG Ash in a Pokemon.
*Obviously Ash's Lucario does care about his friends and trainer, but this is relegated when it comes to becoming stronger, it is like a metaphor for Ash and Love, he knows that it exists, but it is not his priority.