1. I know I know its not healthy, But does these pills help (I am talking short term and I will stop when I reach my goal weight)
(No, expect to help some supplement companies get rich, you to potentially get physical damage, and definitely a lower bank balance)
2. Which ones are good.
The best ones out of what Lens said, are the Fish Oil and CLA, because they are derived from food sources, but they have other positive benefits too, not just supposed fat metabolising benefits.
You might not get much if any fat matabolising off those, but you could get improvement in things like Brain function, Cholesterol levels etc etc, but that's not me saying you should take them, only that compared to herbal or chemical products that could be labelled Metabolic Enhancers, F O and CLA have more purported benefits, and are healthier by a country mile.