After Satoshi and Lucario prepare for their upcoming battle against Kibana, Go’s Keromatsu suddenly evolves into a Gekogashira. Satoshi is reminded of his own Gekkouga and decides to head to Kalos to have Lucario learn some new techniques from Gekkouga. Later on, Satoshi and Lucario both feel Gekkouga’s presence. When a bunch of roots appear and starts attacking Lucario, Gekkouga appears. Lucario and Gekkouga have a battle, but Lucario isn’t able to keep up with Gekkouga’s speed. Frustrated, Lucario runs off and is followed by Gekkouga. Gekkouga finds Lucario and starts teaching Lucario how to improve its aura abilities. When the two Pokémon detect that Satoshi and Go are in danger, they immediately run back to protect the boys. Lucario and Gekkouga join forces and take down the roots with a combination of Water Shuriken and Aura Sphere. With the situation now resolved, Satoshi and Lucario thank Gekkouga for its help and bid it farewell, with the latter disappearing back into the forest. (Source: Wikipedia)
