Met a bug about
Natural Gift-Water under
Desolate land.
https://replay.pokemonshowdown.com/gen7ubers-929830658
In the replay above we can see that ludicolo carrying chesto berry used natural gift (water type) to Groudon-primal and caused pretty decent damage. However, after checking it with showdown damage calculator and many other description about natural gift, I found this is probably wrong.
Later, my friends tested it on 3ds - natural gift water should offer no damage to pdon. So I suppose this problem should be fixed.
P.S. We also tested about natural gift ice to mega-rayquaza, which works surprisingly normal lol. Forgive my poor English, and I hope you all can understand what I mean.