Thank you, Phazon00! I added Ferroseed.
A few pointers, though, for future set entries. Please do not abbreviate the name of Pokemon or their moves. (ie Ferro or Seed, Rocks). Also capitalize typing, such as Water. I also want to remind to not talk about general flaws in the shortcomings section, but flaws that rain teams can exploit - since this guide is written for players running RU Rain teams. Pokemon like Whimsicott, which doesn't have access to Rain Dance, would not be found in Rain teams, for instance. Since our readers are playing Rain, you don't need to write teammates for Ferroseed.
I added Gyro Ball in the moveset, because most Ferroseed has it in their standard moveset. Otherwise this was solid work - thank you, again, for your contribution, Phazon!
EDIT: Another Entry?!