After trying to finish this set of limited time tasks for about 2 weeks, I finally did it. What really sucked is that some pokemon you couldn’t find in the wild, but would only show up after doing some field tasks. Then up till yesterday I had 4 left, then got 3 of them from tasks I got by spinning pokestops or lures. Then after midnight, I was given the last task I need and got last pokemon to compete it, Chimchar. Sigh, that was so mean, but I did it, and now I can brag about it.