Smilodon is one of the Cenozoic companions of Leptictidium. He lived during the Pliocene period, but just like Leptictidium, he's the last of his species alive.
Now, helping his friend Leptictidium on Wikipedia, Smilodon is mainly dedicated to destroying vandalism (that is, reverting edits made in bad faith and nominating articles created by vandals for deletion). Smilodon would love to lead a relaxed life, but there are childish people who have nothing better to do than to write nonsense on Wikipedia. They are not too clever; in under five minutes, their stupid changes will be reverted, while they may be banned indefinitely.
Smilodon is one of the alter egos of User:Leptictidium on Wikipedia.