In this setting, humanity has evolved on a very different earth. Creatures roam the planet, with each species being capable of unique abilities. Powers range from breathing fire, shooting electricity, to releasing acid mist that melt skin. These creatures love to fight, and share the ability to metamorphose. As they continue to fight battles, they get stronger and change into more powerful versions of themselves, with their abilities becoming more destructive and numerous.
Many of these creatures are dangerous and hostile. Humanity has managed to survive by taming these beasts and enslaving them. Technology has developed around these creatures in order to make use of them. A self contained unit has been designed to "capture" these creatures and transport them to an alternate dimension inside the unit. It is encoded with the user's DNA and enslaves the beast to the user's will, and allowing them to be used in modern day life.
The super beasts are utilized in many ways, such as healing, free energy, war and defense, as well as other numerous applications. They are also used as pets and companions. This has led to an age of prosperity in the world. However, there is the potential for misuse.
Many foolish owners take to the streets or gather in underground clubs for "beast battles" in which two beasts are made to fight one another. The collateral damage can cost millions of dollars, with innocent civilians sometimes getting hurt or killed in the crossfire. Some nefarious owners use these pets to assassinate their enemies and commit crimes. To make matters worse, there are nation's or groups who use these beasts for grand nefarious goals.
An evil organization, dubbed "the organization of evil, routinely murders owners and steals their creatures, for the purpose of selling them to the highest bidder. They have become a terrorist superpower, supplying rogue states with powerful beasts to use as weapons of mass destruction (WMDs). As a result, the world is engulfed in many wars, and lone wolf terrorists use these beasts to further their agendas.
Based on this scenario, how can the world community control and regulate the use of these super beasts? What limits can they impose to limit opportunities for violence?