The BULLDOG application was developed with the collaboration of six European institutions from six countries (RO, EL, IT, PT, SK and IE) with the support of the ERASMUS + SPORT program of the European Commission. The main objective is to prevent and combat bullying, discrimination and intolerance in team sports by developing a great innovative game against bullying, the BULLDOG game, using modern technology and anti-bullying activities in the playing fields.BULLDOG aims to identify, through an assessment test, young athletes vulnerable to bullying and victims of bullying who suffer secretly, young athletes with a predisposition to aggressive behavior and athletes who can serve as role models in role play activities.In addition, BULLDOG uses 60 videos that show cases of bullying and through which it aims to:a) educate young athletes, parents and coaches,b) provide solutions to different types and cases of bullyingc) evaluate the knowledge acquired.