This is the bad ending of The Good, The Bad, and the Tigre.
This episode was the only episode to have 2 endings that were voted upon by viewers in which the good ending was voted. While this one would be featured as an extra in other areas. This is the ending people did not vote for which show cases Manny choosing a road of evil and even coming to the point where he becomes the unquestioned ruler of the world.
The gallery for this episode may be viewed here.