Since I recently had my island destroyed by another player, I decided to post this. I was told it was impossible to fix a destroyed island, but it is possible, and not at all difficult.
All you do is go on a tour. You'll probably find coconut or bananas on the palm trees, just shake them and take some fruit. These will be in your pockets once you're finished with the game. Go to the fishing/bug catching area and plant the trees with the shovel. I recommend planting three or four palm trees, it's much easier to catch bugs by doing this, because there are so few trees. Leave the island and time travel/wait for about four days, and the trees will be all planted. Your island should now be fine.
I hope this helped.
All you do is go on a tour. You'll probably find coconut or bananas on the palm trees, just shake them and take some fruit. These will be in your pockets once you're finished with the game. Go to the fishing/bug catching area and plant the trees with the shovel. I recommend planting three or four palm trees, it's much easier to catch bugs by doing this, because there are so few trees. Leave the island and time travel/wait for about four days, and the trees will be all planted. Your island should now be fine.
I hope this helped.