I never heard of this anime movie until the internet, as this was ultra rare, and was never released in America (in fact, this was never re-released in Japan in any form). Made a year after the original Super Mario Bros. game was released, the anime movie sees Mario and Luigi as grocery store owners. One night, Mario meets Peach while playing video games late at night, where Koopa beats him and captures her, leaving her necklace. After a dog grabs it, the two chase it into a pipe, leading them into the Mushroom Kingdom, where they are tasked to stop Koopa, who is king of the Metal Kingdom, and save Peach from marriage, while also collecting the three powers needed to stop Bowser.
As this was made a year after the original Super Mario Bros. game was released, continuity was not established, so there are a lot of things that are different from the Mario lore we know today (Luigi is wearing blue overalls over a yellow shirt, and is greedy, a trait people know Wario better for having, and the film has some characters exclusive to it, like Kibidango the dog, and a Toadette that predates the official one), this is a okay, if not weird Mario anime movie. The main thing I like about it is the soundtrack, as it not only has music from the video game, but also the neat song "Doki-Doki Do It".