At this point, ever Hacchin-Pamos has to give birth to a litter or about 100 Hacchin-Pamos. Because obviously the male dies after the wakka chikka wakka chikka and the female dies after giving birth and then they all die left and right...
I guess they could also be reproducing asexually (budding), which would also work as long as one somehow manages to stay alive. Actually, that seems the most plausible. Every night all the remaining Hacchin-Pamos double in number.