Replacing SkyBlock Textures

To replace a SkyBlock item texture, you need to create a JSON file in the assets/skyblock/items/ folder with the id of the SkyBlock item you want to replace.

Replacing the Hyperion with a Diamond Sword

assets/skyblock/items/hyperion.json

{
    "model": {
        "type": "minecraft:model",
        "model": "minecraft:item/diamond_sword"
    }
}

Replacing the Hyperion with a Custom Model

assets/skyblock/items/hyperion.json

{
    "model": {
        "type": "minecraft:model",
        "model": "<namespace>:item/hyperion"
    }
}

assets/<namespace>/models/item/hyperion.json

{
    "parent": "minecraft:item/handheld",
    "textures": {
        "layer0": "<namespace>:item/hyperion"
    }
}