The signing of Kylian Mbappé to Real Madrid has not only strengthened the club on the pitch but also created a commercial frenzy like never before. With Mbappé's No. 9 jersey sales skyrocketing, Real Madrid has set new records in merchandise revenue, surpassing top European clubs. The unprecedented impact of Mbappé’s transfer, comparing it with past signings and analyzing its implications for the club's global market presence.