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Normal type easily. With a snorlax.
I even spent too long trying to figure out the logistics. A snorlax eats its own weight every day, but it can even eat rotten food. Assuming I'm just as poor now realistically I would just need to find a few dumpsters for Snorlax to chow down on. Assuming any organic matter works, trees are on the menu.
Also you could probably sell the fertilizer.