This Pokémon bears little resemblance to its docile pre-evolution. Gyarados is infamously known for its fierce temper and wanton destructive tendencies. Once it has worked itself into a frenzy, it will not calm until everything around it is destroyed—this tendency is attributed to the dramatic structural changes its brain undergoes during evolution. It seems attracted to violence. During times of human conflict, Gyarados are said to appear, burning entire cities down to the ground. In addition, Gyarados are also notoriously difficult to tame even after they are captured by the Trainer, usually requiring an exceptional amount of work in taming it until it can become loyal and obedient to its Trainer. It is believed that if one is treated badly as a Magikarp, it shall not fight for its trainer.