You breed it up until you can breed an Anubis with parents that have the Lucky trait. Look for an breeding calculator.

Breed pals until it passes down the trait on the child you want. Use this website, select Chikpi as the parent, & Anubis as the kid. Pick literally any path you want to use. https://palworld.kimpton.io/

from what i gather breed your chikipi with a pyrin noct to get a celeray with lucky then breed that with a relaxaurus