I want to edit the blue koopa shell, can you help me guys

/player/mario_shell_LZ.bin = Shell that the character (Mario/Luigi) wears
(this is a NSBMD with a renamed extension)

/BG_ncl/d_2d_A_J_jyotyu.ncl.bin (palette)
/obj/I_item.ncg.bin (texture)
This is for the item coming out of ? blocks
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since ktrmambiance already mentioned the model and the in-course item, ill just cover modifying the bottom screen item slot icon. The ncg for it is "UI_O_1P_game_in_d_ncg.bin" and it uses the palette "d_2d_UI_O_1P_game_in_o_ud_ncl.bin", both of which are in the uiStudio folder.

1. Extract the file "UI_O_1P_game_in_d_ncg.bin" as you'll need it for later.

2. Open "UI_O_1P_game_in_d_ncg.bin" as well as the palette "d_2d_UI_O_1P_game_in_o_ud_ncl.bin". Before clicking "Add all" tick the "16 color" box.

3. In nsmbe's graphics editor, tick the "View in 4pbb format" checkbox, set the tile width to 8, and select palette 11. Then click "Export this bitmap".

4. Make the desired edits in your image editor of preference, but make sure your sprite doesn't go into the other sprites. when your're done, remove anything you don't want or isnt part of your powerup sprite (that includes the other powerup and ui related sprites). Save the image.

5. Go back to nsmbe's graphics editor, click "Import this bitmap and recreate palette" and select the edited image you just made. Save the image and exit the graphics editor.

6. In nsmbe's file browser, select the file "UI_O_1P_game_in_d_ncg.bin" and replace it with the one you extracted in step 1.

7. Repeat steps 2. and 3., but when exporting the bitmap be sure to name it something different from the bitmap you edited earlier as to not replace it.

8. Open both exported bitmaps in your image editor of preference, take the powerup icons you made in your edited bitmap and replace the blue shell powerup icon in the bitmap you just exported with it. This time, you should not delete the powerup or ui related sprites. Save the image.

9. Go back to nsmbe's graphics editor, click "Import this bitmap with existing palette" and select the new edited image you just made. Save the image and exit the graphics editor. Thats pretty much it.

Sorry if this is a bit confusing, if it helps I can probably add images later. Unfortunately nsmbe's graphics editor is a bit limited so you kinda have to jump through hoops to replace some things without messing stuff up. also if you want to edit the blue koopa troopa pretty sure your only option is to hand-edit the palette to make it look fitting or just to not use them in levels (or use asm or somethin ig).

excellent tutorial, friends look,at the result



but I would like a tutorial on how to make the item shell yellow and also in the map inventory, here are some screenshots to be more specific





I hope you can help me, friend

That sure looks cool
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thanks dude, actually i wanted to edit the blue koopa and turn it yellow, but i plan to do one thing with it, without using asm hack, last time i use asm hacks, sorry, well i already have «the golden shell»

Cool, no problem. I look forward to see how it works.
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more attractive, since the blue shell is a dull color, I plan to make the shell brighter since that yellow is very dull, but thanks, when I said, that I was not going to disappoint anyone with beta 4, I was not lying, besides this hack will have a spaceship, I have not seen something similar, in a hack and as a result of that I had to put a new power, right?

Of course
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That icon is in

/uiStudio/UI_O_1P_course_select_o_ud.ncl.bin
/uiStudio/UI_O_1P_course_select_u.ncg.bin

And the texture for the shell coming out of ? blocks is mentioned in my first post there

Those require palette edits, and IIRC NSMBe 5.2 or 5.3 should be able to do that, in the NCG editor by ctrl+clicking a color in the palette
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pallete of shit ,look, I'll keep trying, could you explain me in a more specific way, ktrmambiance

Did you LZ-Compress the palette (ncl) or the graphics (ncg), ​after editing?
The files for those don't require compression IIRC
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was giving it wrong, I already solved it thanks ktrmambiance

but you know how to solve this, friend


I don't know what I did wrong and ended screwed up the creeper

I think that you messed up the Jyotyu palette, replace it with a fresh one i guess
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Well, I was able to repair the creeper, and I'm going to tell you how I did it, if you import one palette the other will be spoiled, I just had to edit the palette in the editor itself, and looking at the colors I rebuilt the palette, following an order , palette one is for the mushroom, the vine and the turtle, palette 2, is for the living mushroom, head of the vine, the flower and small mushroom that I think, advice use only colors of medium consistency since if it is very white will turn black and vice versa, I hope this helps, I did not take screenshots to not show levels of my hack, I thank to:

Ktrmambiance

Keeper