If you added a creature to the pack but it still drops its normal loot, work through these checks in order. Most problems come from the name or from the edit not being saved.
Check the Pack Itself
- Right world: Data packs work per world. Make sure the zip you edited is in the save folder of the world you are playing. On a server, it must be in the server's world folder.
- Edit actually saved: Reopen the zip and open the text file again. If your new entry is gone, your archive tool did not write the change back. Extract the file, edit it, and put it back into the zip, replacing the old one.
- Still a zip: Keep the pack in its original form, and do not leave a half-extracted copy beside it that might be confused with the real one.
Check the Entry
- Exact name: Compare your entry with the name shown by
/summontab-completion. Look for typos, a missing prefix, or wrong underscores. - Same format: Your entry should look like the entries already in the file, on its own line if the others are.
- Right file: Make sure you added the creature to the animal file whose carcass you expected, such as chicken.
Reload and Retest
Fully exit and reload the world after any change, then defeat the creature again. Remember the carcass uses the vanilla model, so check what it is rather than how it looks.