Thanks Haruka!
The Character Generator isn't really compatible with the Rpg makers since they have a frame limit of 4 for each animation!
Btw I've made a lite version of it, you can find all the stuff in the related folder: "RPG_Maker_MV" -> "Characters" -> "MV_Character_Generator"!
To create your spritesheet, just open an art program (even a browser one like Piskel) and import the files with the following order: body, outfit, hairstyle; then export the .png and you are ready!