Shedinja doesn't really have a base HP of 1. It is actually just set to always be 1, so don't even include that.
Stat calc:
((2xBase + EVs/4 + IV) x Lvl / 100 + 5) x nature
HP:
((2xBase + EVs/4 + IV + 100) x Lvl / 100 + 10)
Davy: Timid is also pretty good if you aren't scarfing it.
Go for 31 speed and fairly high SAtk, and decent defenses and HP.
Worked like a charm, thanks.