Pro Tip? If you have a lot of Animations from external sources like DLC, make a dedicated project just for Animations to keep as a library, and copy/paste them in as needed
I've been using RPG Maker since 2015 and just started doing this LOL. Animations, when bought as DLC or on Itch or wherever, typically come with an Animations.json that sets up the frames, screen flashes, sound effects, etc. So it's hard to "archive" them inside an assets folder, which is what I typically do for things like tilesets and music. You can't really preview animations directly in the folder to make decisions.
So today I made a project called "MZ Animations" and just imported all of the animations I have into this one project. Animations from Dreams Circle, Wizards Pack, Particle Effects Pack, etc. I even imported all my old MV animations to the same project.
Now I can just scroll through this single database to find an animation I want, and copy/paste it into my actual project folder.
I do still have to find the actual effekseer file (or spritesheet) and any sound effects to manually copy/paste into the project. But I think it is better than importing everything into my actual project. It keeps it all clean.
I dunno, maybe this was obvious! Feels like a game changer to me LOL.
Also, when I plan out my skills in Excel, I put the Animation name in a column, and now the ID of ALL my Animations is relevant. So if I have two completely different "Fire I"s by different authors. Now I can put "441 Fire I" for example which is different from "230 Fire I". Now I know 441 is being used for this skill, and I won't re-use it for another skill!