Creating a Doraemon-themed room involves incorporating the beloved cartoon character into various aspects of the decor, including wall designs. Several creative ideas can be used to achieve this, such as painting a large mural of Doraemon and his friends, using Doraemon-themed wall stickers, or creating a collage of Doraemon images. The color scheme typically involves bright and cheerful colors like blue, white, and yellow to match Doraemon's iconic look.