As annoying as the stun mechanic is in Street Fighter, I like the concept of attacks applying a certain amount of meter onto the opponent, and if it fills all the way, the opponent gets a penalty. In my game, Sigma Busters, I may implement a similar meter, but instead of stunning, filling up the meter forces you to lose a star, which is the resource needed to perform enhanced Special Moves and Hypermax Attacks/Supers. The idea is that the heavier the fighter, the more stun they can sustain, balancing how they are often combo food due to their higher weight. The idea is that you can't just hoard stars, as there is a tangible risk to keeping them, as if you take too much stun, you can lose one of your precious stars. How does that sound?