What are watch cars?

This is my first story so have a little faith in me and I am broken just to make it clear. I really hope you like it. 🤞🏾
___________________________________________ Jino and his Watch Car, Bluewill, compete in the Battle League to become world champions. Meanwhile, a dark force threatens to destroy them all. With the last mind key collected and a world to save and to lovers that won't part ways. What will become of the world when it's left is four young kids hands.