Ok, Just Gonna Get To The Point Quick.
MY CUSTOM NSMB. 2 TEXTURES DONT WORK, I TRIED ON BOTH CANARY AND NIGHTLY AND STILL DONT LOAD, I DONT KNOW WHY, ALSO YES, I ACTIVATED THE LOAD CUSTOM TEXTURES AND STILL DOESNT WORK, AND I PUT THE TEXTURES IN THE RIGHT FOLDER…
In order for us to provide better support, we need to see the log generated by citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File
Did you also put the pack.json file in your custom texture pack? If not, you’ll need to do so. When you dump textures, that file gets created in the texture dump folder.