The original cartoon is like 90% of what non-hipsters think of when TMNT are mentioned. The movies are the other 10%, and no one cares about any of the movies except the first two(and even the second is debatable). And sorry, but I generally disregard human characters in shows with non-human leads, because they are as a rule completely forgetable. I won't say he didn't have a prominent role in the movies, but I didn't find him a memorable character in any way because ****ING ANThROPOMORPHIC TURTLES WITH NINJA WEAPONS.
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From his looks Magus is Macho Man Randy Savage as an anime zombie. The black wind howls, and one of you will snap into a Slim Jim ooh yeeeah! -sonicblastpunch