Harvest can always work under the sun.
Try it in your game.
Otherwise it is about one third chance to be active.
Is this confirmed? If so, then oh boy...
About that log, it broght a smile to my face. However, it seems shut down by taunt users even after you pass Eggy the boosts. What stops a gliscor (blasted poison heal), erufuun, or even a kojondo from raining on your parade?