Well, let's rip your Groudon to shreds, cos it's a bit useless to be honest.
EV seems a bit spread all over the place, but his attack seems to be high enough. Lacking in some much-needed defence, however.
Oh yes, get rid of the Soft Sand. 1.1 boosters really don't pack that much punch, better to resort to a berry of some sort. I recommend Lum, Liechi or Salac.
Hyper Beam is a no-no. 2 turn moves are useless, they never do as much damage as people think, and it gives your opponent a free turn to attack against you. Free turns = fainted Pokemon, after all.
Solarbeam is another bad move. Even with Groudon's Drought, Solarbeam is going to be a light tickle compared to any physical attacks. There's been a whole discussion about how bad Solarbeam is on Groudon, go back and find it somewhere in this forum.
Earthquake: This Groudon's only good move. STAB and high Attack for decent damage.
Eruption: Ok, it gets a bonus from Drought, but Eruption is still a poor to average move for Groudon to use. You really want to concentrate on his much higher physical attack rather than load up on useless special-based moves.
As for moveset, something like this works well for Groudon:
Groudon@Salac Berry/Lum Berry
EV: 252 Attack, 252 Speed, 6 Sp Def
Earthquake
Rock Slide
Swords Dance
Aerial Ace
Aerial Ace to take out those wannabe Sunnybeamers, and Rock Slide for all-round damage against those immune to Earthquake.