Static engine
From Mario Fan Games Galaxy Wiki
Static engines are custom built movement engines. They are used by programmers to create movements (for player characters or enemies) that are not possible with the built-in engines. They are relatively difficult to make, but when mastered, give the programmer so much more control over the character's or object's movement (which in turn benefits the player).
The name "static engine" comes from the fact that, instead of moving one object around using the built-in engines, the object in itself is static and the movement is simulated by changing the object's coordinates directly.