It depends on the time of year, and how severely you prune it. Later in the year is better for it. If you bare the roots, your willow will die of malnutrition.
These Pokemon only appear once. If you kill it you could soft reset (press L+R+Start/Select). You must save before fighting the Pokemon so soft resetting is helpful. Another thing you...
It should show cut-in pressure just below the typical 30 psi mark. That way, when a user opens a valve and the pressure in the system and tank drops below...
Well, you can cheat and enter in codes to play all characters. Go to YouTube and find the video called "Don't Starve Cheats/Console Commands - Unlock ALL Characters!"