Stone Protectors.
 

Anyone recall these guys? I only discovered then last year. They were a blend of the Ninja Turtles and Troll Dolls. They had crystals in their chests that flashed. The line contained the 5 heroes, Corneilus, Max, Cliff, Chester, and Angus, and the villains Zok and Zink. Series 2 had variants of the heroes, as well as 2 new villains. However, no Princess Opal ever materialized (King Bumi Syndrome strikes again!). A cartoon was made, and lasted 13 episodes, as well as a comic series, video game, and even board game.

Yeah, I remember somewhat. I had one figure that I bought loose at a used toy shop thinking that it was a ninja turtle character. He was in white karate garb with red trim and had neon green hair with sunglasses, I think. It was actually kinda rad. Never did know anything about it until 3-4 years ago. Had no idea it was a series and all that.

I had the rock climber one. I didn't know they had a cartoon or anything, they were really mediocre toys.