The Big Hero 6 theme world takes place in the imaginary city of San Fransokyo. Cars have been replaced by trucks with boxes, trolleys, blue busses and small smart cars. Sometimes, Hiro's microbots will also replace cars and will arrive in groups. Also, green, yellow, and orange cabs will dot the map and replace cars instead.
The whole city has been changed like the city in the movie with Chinese lanterns, brown street lights and pink trees. Buildings have also been changed in a new modern and Chinese environment.
When the player doesn't move for too long, one of San Fransokyo's blimp will appear catching up the character and ending the round of gameplay. This world contains twenty characters at the moment with one more to be added.