Enter Fortune Park, and go towards the Atlantica Casino, but do not go
in. Instead, follow the wall right until you see a maintenance door.
There should be a stick of dynamite and a hunk of meat right outside the
door. Pick both of these up, then enter the maintenance room, and
combine them to get the Dynameat. Next, go to the fireworks stand, grab
some firecrackers, and jump up on top of the stand. Lure a large amount
of zombies near you using the firecrackers. Once there is a large group
of zombies, jump into the middle of the crowd, use the Dynameat, and
then get out quickly. Once it explodes, you will get a lot of PP. Once
you enter a nearby place, all the items will respawn. Repeat this as
many times as desired. *Note:* This trick is still very effective at
levels 45 and higher.