A concept I did, connecting Lucario and Mightyena in the past.
Theory: This Pokemon would have been fairly large and powerful, reminiscent to modern day Ursaring. As the Lucario line's ability to detect and manipulate aura would have just been developing, the appendages along its body would help compound the faint detections, allowing it to track hiding prey. This Pokemon would have been able to use bones and other such objects as basic tools and weapons.
Heh...I kinda feel like this ones only half-done considering I did it on a whim.