Advice on my Goodra idea.

[Marcusube]

Run Chesto Berry instead of Leftovers. Those two turns of sleep can put you at a disadvantage as the opponent can set up on you. Also, the lack of steel type and fairy type coverage may put your stratergy 6 feet under. Sap Sipper would also be better instead of Gooey because someone can easily come in on your setup and leech seed you, forcing you to switch out.