"Hey there! My name is Doraemon! I'm a super-sized, gizmo-ized, gadget cat from the future! I get sent back in time to take care of this guy, Noby, but he's a mess! And that's where I come in! To save the day with an amazing invention from my fourth-dimensional secret gadget pocket! But things never turn out as planned! Get ready, 'cause here we go again!"
— Doraemon explains the premise in the Doraemon: Gadget Cat from the Future opening
Shalalala, inside my happy heart
There is a dream that's ever-shining
Doraemon, your pocket is the key,
to make my dreams come true
Shalalala, let's sing a song
Everybody, together join along
Doraemon fills the world with dreams,
as long as you're here you bring us happiness
— Doraemon UK opening
Oh, oh, oh, we love you so
Doraemon!
— Doraemon 1979 opening
"You have brought shame upon your family! Have a happy robot cat!"
—Shaenon Garrity's
summary of the "quintessentially Japanese" premise

Look! A propeller on top of your hat!
Albert and Sidney, a boy and his cat!
Albert has magic,
Sidney has fun.
Look at them soaring
And then exploring
And youll be seeing Albert and Sidney again!
— Opening theme to The Adventures of Albert and Sidney the rare Cinar dub of the 1979 version.