Slash (TMNT comics)

Slash is a character in the Teenage Mutant Ninja Turtles series.He is giant mutant Turtle that was originally a villain in the series but has turned good and became an ally to the Turtles.

Archie Comics
Slash of the Archie Comics was an alien who was misguided villain who fought the Turtles on numerous occasions until he turned good and later becomes a member of the Mighty Mutanimals.

IDW Comics
Slash was created by Baxter Stockman to hunt down the Turtles until Mickey being kind to him led him into becoming a good guy and even becomes a member of the Mighty Mutanimals.

1987 series
Slash was orginally the Pet of Rocksteady until his mutation. Slash was a diwited villain who went a rampage.

2012 series
Slash was orginally Spike Raphael's pet who mostly appears in backgrounds until in season 2 where he mutates into Slash at first he turned into a villain but overtime he eveutnally turned good and later founds the mighty Mutanimals as their leader.