Wyatt Bernstein is a typical boy who enjoys hanging out at the local arcade with his friend Pesto.

Wyatt Bernstein is a typical boy who enjoys hanging out at the local arcade with his friend Pesto. In a household full of females, Wyatt desperately wishes for a brother he could do fun guy stuff with and who would provide him much-needed male reinforcement at home. When he is reluctantly taken to a Build-A-Bestie store by his family for his birthday, he creates a boy-filled version of a Bestie. Wyatt's dream finally comes true when his creation, Crash, comes to life. Together, the new brothers help each other navigate life's experiences: Crash helps Wyatt come out of his shell, and Wyatt introduces Crash to life as a kid. Although they sometimes have their differences, like true brothers, they always have each other's back.—Disney

Wyatt Bernstein has never gone through life without a challenge. He is in desperate need for a brother in his house of all girls. On his 12th birthday, he is invited to a build-a-bestie store, where you could make a doll. Immediately after, Wyatt's most treasured wishes become real when his creation, Crash, is given life. Still hanging out with his other friend, Pesto, Wyatt and Crash look after each other and support each other in the battlefield of tough life at Wyatt's home.