This animation is quite crazy, it has a lot of effects, high skill fighting and dramatic moments. The thing is, it's based on donguri990's gameplay video of him fighting Roxas in critical mode. Without taking damage he whooped the floor with him in less than 5 minutes, showing an entraining level of immense skill. Anyways the Brazilian artist Julia, translated this in to a 2D animation which does not underperform any of the original source material.
This project consist 3000 frames shown in 5 minutes and took 7 months to complete. Combing the different skills of two talented people made this whole video possible in the first place. Check them out!