Looking for some Pokemon for my team

[Cubby Gamer]

I'd personally switch out double edge for giga drain, leech seed, or earthquake. Giga drain/leech seed will help you stay in the game longer and all though earthquake is a great way to screw over fire and rock types the grass typing already gives you one up over rock and fire types do tend to be pretty fast, so leech seed is probably the best choice in this sitch. Unless your good at predicting when to switch.
Other than your rotom wash and diggersby, your team is pretty weak to fire. I'm not sure who your core is, but I'd also recommend putting never-melt ice on at least one, and putting a fire dousing move on at least two of them unless you're hella good at switch predicting.