• English / United States: Roy's Lucario
• Japanese / Japan: ロイのルカリオ
• Japanese (Romanized) / Japan: Roy no Lucario
• Japanese (TL) / Japan: Roy's Lucario

Roy's Lucario is the Wave Guidance Pokémon and is a Fighting/Steel type. It is an alternately colored, yellow Lucario. The power of its wave guidance increases when it undergoes "Mega Evolution", evolution beyond evolution made possible through the bond between Trainer and Pokémon.

Master Mayonnaise suggested that Roy and Ult train at "Mayo-maze Palace" to learn about Mega Evolution while they were in the Kalos Region. He's also the one that gives them their Mega Rings and the one that introduced the duo to a mysterious Pokémon called "Yellow Blast", which ends up being Roy's Lucario after Roy battles and gets it.

The Yellow Lucario gained its nickname Yellow Blast due to its fighting style resembling air blasts. It's a truly skilled master who had continuously fended off challenges from the local showoffs in Miare City.

Rematch Battle Roy's Lucario VS Nemona's Pawmot

The rematch between Nemona and Roy reached a fever pitch as Nemona's Pawmot squared off against Roy's Lucario once again. As the battle intensified, both trainers unleashed their ultimate trump cards: Nemona activated her Tera Orb to Terastallize Pawmot, while Roy countered by triggering his Mega Ring to Mega evolve his Lucario.

The onlookers at the stadium watched as the two powerhouses traded heavy blows. In the final, breathless moments, Pawmot executed a perfect dodge to slip past Lucario’s finishing move. Seizing the opening, Pawmot delivered a decisive Mach Punch, clinching the victory for Nemona.