@RuNa:
LOL Are you serious? Let me guess, you also think that Ganondorf and Wolf aren't clones either, right?
I guess Akuma isn't a clone of Ryu either…
M2 and Lucario literally have no similar moves besides neutral B and the property of having weird flames coming out of their attacks.
Literally every move otherwise is pretty much completely different. No electro body shock neutral air, no tail swipes, no psychic specials, all of Lucario's attacks utilize his arms or legs vs M2's tail, I guess maybe you could argue that the side special was kinda like confusion because it was a grabbing move, but its properties are pretty different.
Wolf and Ganondorf are obviously clones. It's one thing where essentially the same backbone and structure are completely reused and just modified in a few properties or the stance of the character, like you can see with Roy and Marth or any of the spacies, but when the vast majority of M2's moves involve a tail that moves structurally completely different from Lucario's attacks as well as completely different animations (to match the backbone), Lucario and M2 really aren't similar enough to be called clones, and if they borrowed neutral B from M2, it's probably mainly due to the fact that Lucario's signature tech is Aura Sphere.
At this point you may as well say that Ike is a clone of Roy because they have a few similar specials and a fire element.