So, I was making a hack and wanted custom level previews. I couldn't get that to work, and didn't get any answers, so I decided just to use the Newer engine for my hack. I wanted the hack to stay vanilla, so I put in all of the vanilla textures and all that. The Jyotyu and Sub Nohara textures worked just fine, but when I put in the powerups it all messed up and they turned black. I found out that the powerups in Newer DS use a different palette file than the original, so I put in the powerup textures ad redid the new palette file. It looked fine in the editor, but I went in-game and... this... And I did check all the newly added folders to see if there were any other palettes for it, but there was nothing.
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In vanilla NSMB item bitmap uses jyotyu palette. In Newer, item bitmap uses palettes from I_enemy256_ncl.bin found in obj folder.

Oh, thanks!

EDIT: Wait actually there's still a problem:

These pink things follow it around.
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Check out "New-ISH" Super Mario Bros. DS HD*!!
Renewed Super Mario Bros. still exists, though.

men it is a texture problem im noob too i can´t help you im so sorry But try change palet