A stage transformation is a feature that is used for certain stages in the Super Smash Bros. series. Stage transformations vary greatly in differences, with some stages changing minimally, and others becoming noticeably different. Typically, transforming stages in the Super Smash Bros. series are banned from tournament play, depending on how drastically a transformation can affect a match.
A stage transition is a stage transformation that occurs within a cycle of transformations. As a stage transitions, it moves along a determined layout, resetting back to the start as soon as it reaches the end. Like transforming stages, transitioning stages are typically banned from tournament play.