Since the fandom is partially covered by 3rd star power ideas, I will give it a try.
Bibi 3rd Star Power-Bubblegum Benefits
Every time Bibi's Bubble bounces from the wall, it does +200 damage to an enemy brawler. If friendly brawlers make contact with it, it will heal 200
Leon 3rd Star Power-Chameleon Instincts
When Leon is hiding in a bush or invisible, it will start a bar that takes 2.75 seconds to charge. When the bar is full, Leon's attack is increased by 20% damage. However, at the same time, when the bar is full, Leon's speed is now 720 (Its originally 820).
So does one of these star powers need buffs or nerfs? I don't know so comment what you think.