Yes, it is. :) Lucario is the pokemon's english, german, and french name. Rukario is it's Japanese name.
Because they're using the Japanese name for it. Most of the citizens of eastern countries use the Japanese names instead of the English names.
No. Lucario is a single form. Real Lucario & Lucario Biologist. ~Bolt the lucario
No, its impossible. Real Lucario & Lucario Biologist. ~Bolt the lucario
lucario, always lucario
Riolu evolves into lucario and lucario doesn't evolve.
Yes, lucario's fragil pawpads are sensitive. Pokemon Master & Lucario Biologist ~Bolt the lucario
No, Lucario does not evolve.
Lucario
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It depends which Lucario you are talking about. Lucario have a 87.5% chance of being a male in the games. Lucario in the Lucario and the Mystery of Mew movie, is a male. Riley and Maylene's Lucario gender in the anime is unknown. Lucario's Codec information on Super Smash Bros Brawl refers to him as a male.