Alrighty then, for a weakness, the damage is doubled, which I should stop doing, though I may have added up wrong and it should be around 20-22.
Not sure where I got the burn from, as I was trying to remember what I did before about burns. I now remember it was 3% instead of 10 and the -3 Atk comes from the fairly large burn, which also makes the damage slightly lower, but would also be counteracted by Rain Dish.
And an Egg Move from G/S? A move it cannot legitimately learn in-game anymore? That's...obscure.

You should have made it use Zap Cannon.