Hi game mate,
FIRST CONSIDERATION: I'm going to add some links from external resources. I'm not responsible of that content.
I can try to give you a technical answer to that. But my answer depends on an outdated database. Basically you can figure out the list of creatures with no drop following these steps, but it's not accurate:
1.- Go to the free Tibia wiki API offered in this page: Tibiawiki.dev
2.- Go to the endpoint /creatures. Click the button Try it out.
3.- Set the expand attribute to true and click on the button Execute
4.- Download the response by clicking on the Download button that appear over the results (right-down side).
5.- Open the file downloaded, copy all the content and paste it in this page (left-top panel): Online JSON Query Tool
6.- On the right panel use the following JSON query (using JSONPath tutorial) string (just copy/paste it): $[?(@.loot.length==0)].actualname
7.- The Result panel will show you the creatures without loot.
- These results are based on data extrated from tibia wiki page. Maybe they are wrong and outdated. That depends on when they were updated for the last time.
- If you want more accurate results, you can go to the official tool page, download the code and run it by yourself: TibiaWikiAPI
- Of course, as said, it's not my page neither my application. I'm not responsible of what could happen making use of that tool.
Examples of outdated data: the first result is Phantasm. If you check now this creature in the tibia wiki page, it has loot.
I hope it can help you a bit :)