Sweet jesus, when i read there wont be any sun stones in this hack and the creator said he didnt know where you can find them, i gave up my plans for bellossum. So instead, i gave my gloom a leaf stone, lost interest and didnt use my vileplume anymore.
Now i dont know if i should be happy or frustrated about the fact that i finally found a frikkin sun stone!!
Just in case there are still ppl looking for a sun stone to get a) bellossum, b) sunflora or c) espeon : its after the event where giovanni vanishes, at the top left corner.