These are special acmd codes which I've taken and thrown together with a bit of game logic in mind- almost every attack has now been manipulated to match the respective attack power and attributes of the dancing blade attacks which they come from: Red is to strong power while blue is to upwards launching attacks ideal for juggling. Default is used as combo moves while green is for hit or miss power. It's self explanatory once you sit down and enjoy it.
The images provided detail which attacks use which trail and the ideal behind it.
Also included and shown through these images are the saturated trails I made to better show off the different aspects of each attack- they are in the download as optional files as well.
Here are some gifs I made while testing the mods:

And in case you already looked through all the images and couldn't find Side B 4th Down mentioned, it's because I went and had a little fun with it since the frames in acmd for it are disgusting and I felt obligated to clean it up. Each stab now has an individual trail rather than the amalgamation of blah is was before.

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There are options included in the download for a version with trail extensions, and another without. Please let me know if there are issues with either.
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Addition: Lucina has now been compiled for the modifications. She will use the same system as Marth as far as which trails are on which attacks, so plan that ahead if you're switching anything out. For her, I went ahead and made two versions of not only trails, but the animcmd. One of the cmd's provides no extensions, while the other provides the trail extensions (+); one set of trails is simply a darker, more saturated set based on the vanilla provided by the game, and the other set is a darker hue of the popular Canon Awakening Lucina trails. Enjoy.

Let me know if there are issues with either script.
Questions/Concerns? Let me know- have a great 2018 btw.
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Addition: Roy
Roy has now been added to the pack under a very similar, yet different set of guidelines. Since almost everything he has is more than capable of killing just about anything over 60%, there are more red trails than anything else. Orange is used in place of Marcina's light blue while dark blue is still used for anything that pops fighters upwards and green is the "are you sure about this".
Much like all other versions, there is a set for vanilla based code and another set for that which uses trail extensions. Though, to be fair, there's more than just the usual trail extensions included in this version. I added some that I haven't bothered to put out while making some "minor" details.


As usual, let me know of any problems in either scripts, and have a nice day.

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HEADS UP
For those of you who would like to use my various 3DS Max effect templates/saves, feel free to join my Discord Server, Sm4sh Trail & Effect. It's a rather laid back and calm server that lurking is almost encouraged in- you'll gain access exclusive thingamajiggs that I don't put on GB, get to learn about the process in more than just the video format on here, and just hang out as well.