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I watched this cartoon around 2010. It was about some teenagers who can use a device to turn into monsters. There were, I think, four teams which fought over some magical stones. The hero team consisted of two boys and a girl. I remember that the girl was the daughter of the main villain and had some markings on her face (like her father).
There was some tournament that took place. The main character's main monster was something like "The Platinum Giant" or something like that. The other teams (or the evil teams) were all under the command of the main villain. They competed with each other so they can earn new monsters (but I am not very sure if they earned monsters).
There where these old guys (I think they were senseis), which the teacher of the main characters was one of. The main villain was also one of them, but he got kicked out and started the evil teams. The main character used his father's monsters. His father disappeared and left him his monsters.
It is not "Monster Rancher" or "Chaotic".