As simple as could be, taking the files from Ike's non-canonical masterpiece/disgrace- your preference, "Great Aether", and slapping them over his normal trails.
I also took the liberty of, after 10 months, actually making the blue variant good (and putting this mod in the correct category). Most recent method of creation, better colors, shape, and even flare. In fact, the regular trail got a new flare too- one that uses the Brawl Flames flare. My suggestion is that you take into consideration using this far more improved version, because honestly, the one that was here before is kind of pathetic in comparison. The Blue also comes with Great Aether Version trails as well, and you'll find them under its respective directory.