Why are you investing in Attack and using a Mild Nature? I know that Outrage and Earthquake are options, but if they're not used, Attack investment is pointless and something like Modest is better. Of course, that only applies if not using Outrage/Earthquake, so I'd suggest adding a note about using different EVs/Nature depending on what moves are chosen. Also, that EV spread could use some work. 240 / 4 / 250 leaves some EVs unused. A Pokemon can have 510 EVs in total (though two are useless) and a maximum of 255 EVs in a stat, but because four EVs equal a stat point at level 100, a Pokemon only needs 252 to maximize its EVs in a stat. A simple EV spread is 252 EVs in two stats and 4 EVs in a third stat. And Earthquake isn't STAB on Goodra, as BeastMaster said.