Well, as far as brains go, I got the lion's share, but when it comes to brute strength...I'm afraid I'm at the shallow end of the gene pool.
~ Scar, admitting his own physical inferiority to Mufasa.

Villains who are relatively weak in strength and/or easy to defeated by heroes or other villains. Unlike the Incompetent Villain, a Weakling may have truly evil goals that can cause massive destruction or chaos, forcing a hero to face the Weakling, whereas an Incompetent Villain is more likely to ruin their own plans.

The best example for a Weakling is Yu Yevon, who was the being controlling Sin and thus caused massive death over a thousand years, but once Tidus and Yuna faced him, he was very easy for players to defeat, being nearly impossible to lose to.