Doraemon has a fourth dimensional pocket on his abdomen that links to the 22nd century. He can put almost anything in there and pull lots of weird gadgets out! He often uses the gadgets to save Nobita, but Nobita ends up misusing the gadgets and getting himself into more trouble.
Oh no, a mouse! Shoot it with your Air gun or you might break down...
These are some of the tools Doraemon can collect:
Personal Copter - a propeller that you put on your head, so that you can fly
Wherever Door - walk through this door to wherever you want to go
Time Machine - to take you to whenever, this is located in Nobita's desk drawer that Doraemon originally popped our of
Air Gun - a very userfuly tube that you slip over your finger to knock your enemies out with a pulse of air
Because Nora can't do it on his own, Doraemon helps him out!