What is the best way to punctuate titles that have subtitles with subtitles?

Perhaps it is just my Google Fu, but I am failing to find great examples that have more than 2 subtitles.

One example I did see that I personally like was to use a comma to precede the first subtitle, then colon, then dash:

JavaScript, Book 1: How to Code in JavaScript - Beginner's Guide

MLA's rules appear to be that you use a colon for the first subtitle as well as the second. There are also some other rules regarding what to do if the title includes a question mark, ellipsis, or a colon already. MLA doesn't touch on more than 2 subtitles; however, there is a syntax for a work with more than one title which makes use of ; or, as the delimiter, so perhaps stay away from using semicolons.

Star Wars Episode I; or, Star Wars: The Phantom Menace

I would be interested to know if there is a true guideline for this, otherwise I suppose it's up to personal preference.

But for your specific case, I do believe that "the Movie" in "Pokemon the Movie" is not a subtitle. At the very least, every source I just looked at (Wikipedia, IMDB, Rotten Tomatoes, Bulbapedia) did not have a colon precede "the Movie", they just had it as:

Pokemon the Movie: White - Victini and Zekrom