Yeah ascendance is right about most of the unused ones
circle0.png - Looks like a SB file, but wasn't found in the .osb or the .osus
default-comma.png
default-dot.png
default-percent.png
default-x.png - Only score numbers use comma, dot, percent, and x. default- are the numbers that go in the hitcircles.
fruit-plate.png - This isn't a skin element.
taiko-bar-left.png
taiko-bar-right-glow.png
taiko-bar-right.png
taiko-barline.png
taiko-drum-inner.png
taiko-drum-outer.png
taiko-glow.png
taiko-hit300g.png (only appears at results screen)
taiko-hit50.png
taiko-slider-fail.png
taiko-slider.png - None of these are skinnable per-map
So all of those files listed above need to be removed.
These are fine, actually:
LR_Snare Hit.wav - yeah that's used
taiko-normal-hitwhistle.wav - That's used for K notes.
Additional things:
If you're gonna skin failsound.wav why not applause.wav ?
Skinning:
You forgot to specify SliderBorder colour in the colours sections of your standard difficulties. This is required when skinning the hitcircle set.
Hitburst set: You have sliderpoint10.png and sliderpoint30.png. These are optional elements of the hitburst set.
RC wrote:
When skinning an element that is marked as optional, you need to include all the required elements of the respective set,
You currently do not include the required elements of the hitburst set. Either add those or remove the sliderpoint10 and sliderpoint30 images.
taiko: taiko-flower-group.png is included in your folder, but it has the same issue as what was mentioned above. It's part of the pippidon set, but the pippidon images weren't included. Either add those or remove this element.
catch the beat:
Your current way of including a duplicate of the fruit-drop-overlay.png is causing all droplets to appear as gray (overlays don't get recolored)
use a transparent 1x1 png instead.
Another thing...
Taiko difficulties: The background
should not be lowered. Remove the 150 in the .osu file and change it back to 0. Maps with storyboard disable the taiko-slider (the top image that scrolls). Even when the storyboard is disabled.
It's causing this really awkward empty space.