As the pups were mutating to become food, they gained a magic essence to them. The originals died too quick for the power to manifest fully, but the new immortal mochi generation (gen2) became extremely powerful. The villagers discovered their power when they captured wild mochis and found they could make food using the power coming from their foods. The mochis were drawing power from their foods, which acted as an unlimited source. The villagers, noticing it could help their kin at home, tweaked with the mochis' teleporting abilities to send them to Earth.