Before you download any "CIA to 3DS File Converter," keep these points in mind:
There is no scenario where a standalone .cia file magically becomes a .3ds mesh. The 3ds (model) extension refers to a binary format for vertices, faces, maps, and lights. The CIA extension contains encrypted NCCH containers (Nintendo CTR Cartridge Header). They are oil and water. cia to 3ds file converter
Converting one to the other would be like converting a to a .jpg — no meaningful transformation exists unless you specifically want to extract assets (models, textures) from a decrypted CIA and then export them to .3ds. Before you download any "CIA to 3DS File