Yes, NES Super Mario Bros 2 is the real Mario 2, get over it : r/Mario

Super Mario Bros.: The movie's credits scene sets up a sequel - Vox

Every Super Mario Game Ranked From Worst To Best

What are your feelings about Super Mario Bros. 2 be a copy of another game? : r/Mario

What are your feelings about Super Mario Bros. 2 be a copy of another game? : r/Mario

Illustrations from a 1986 Japanese guide for Super Mario Bros. 2/Lost Levels uses a unique design for Mario and Luigi based on the in-game sprites. : r/Mario

What was Mario 2 called in Japan? - Quora

Nintendo Selects: Super Mario All-Stars : Nintendo of America: Video Games

Super Mario Bros 2 was released only in Japan due to the belief that it was too hard for western players. Where did that belief come from? - Quora

Was Mario brothers 2 made with different characters in Japan? - Quora