World 2-5

World 2-5 is the name used for some of the levels:
*World 2-5 in Super Mario Bros. 3.
*World 2-5 in New Super Mario Bros.
*World 2-5 in New Super Mario Bros. Wii.
*World 2-5 in New Super Mario Bros. 2.
*World 2-5 in Puzzle & Dragons: Super Mario Bros. Edition.