I use Cascade gel in my powerclean, the non chlorinated citrus breeze in the dark pine green bottle, and allegedly has the mighty power of Dawn in it. Anyways it works perfectly but you can put even low grade detergent in it and you'd get the same results. Its cheap, cleans at a superior level, and reeks amazingly.
Ive tried the pods before, and pods in a powerclean equal just what you'd imagine, lots of suds depending on which pod your using. The original action pacs by cascade don't suds in mine anymore, neither does the cascade complete action pacs. Some other ones I tried were sudsy, but not every single time it was put in the dishwasher which is strange. Ive not tried the cascade platinum cause it just seems to be a big waste of money, but I know these pods used to create more suds especially during the beginning stages of these pacs being on the market. Guess finally Cascade has gotten the recipes down a science so they don't suds anymore, and that was with a powerclean so id not expect it to suds in anything less powerful for a fact. Its just oddball because sometimes one of the cascade pods does suds in mine, I cant remember which one it is but its got a blue and yellow section.
For much older machines as many said general powder is perfect, its what was used back then and in those machines work very well and work perfect even today.