1. In your WorldEditor, go to File -> Preferences. Then check "Automatically create unknown variables while pasting trigger data". Click "OK"
2. In Object Editor (F6) -> Abilities, copy both "Comical Pounding" and "Comical Pounding Stun (Dummy)" ability and paste them to your map.
3. In Object Editor (F6) -> Units, copy the "Comical Pounding Dummy" unit and paste it to your map. Make sure that the dummy in your map has the stun ability, otherwise you should reconfigure it.
4. In Asset manager (F12), export the "war3mapImported\ComicalHammer.mdx" model to a temporary directory, then import it to your map.
5. In Trigger Editor (F4), copy the "Comical Pounding" trigger folder and paste it to your map. Make sure you check the configurations in "Comical Pounding Config" if they are mistakenly set or not.