Please Help Me Fix My Elite 4 Team.

[*staribunnicutie*]

I'm almost ready to start on victory road but not so sure whether my team is balanced enough and have good movesets. Also should I try EV training? I've heard a lot about it but it seems a bit complicated for a noob like me. Also I know that my Levels are quite low, but what level should i train them to? Also can you recommend moves and Pokemon that I should replace? Ps. Where's a good place I should train?Ikimashou! (Let's go! In Japanese)

Gastrodon @ Lv: 45
Calm
Water Pulse
Body Slam
Dig
Muddy Water


Staraptor @ Lv:47
Mild
Agility
Aerial Ace
Wing Attack
Pluck

Luxray LV:48
Sassy
Thunder Fang
Crunch
Shock Wave
Swagger

Roserade
LV:46
Brave
Stun Spore
Toxic Spikes
SolarBeam
Grass Knot

Dialga LV:48
Bold
Metal Claw
AncientPower
Dragon Claw
Roar of Time

Infernape LV:49
Bashful
Flame Wheel
Mach Punch
Close Combat
Rock Climb

Riolu LV: 26
Lax
Rock Tomb
Force Palm
Reversal
Screech

 

[Source2007]

you seem at just the right level to take on the elite four. and your team seems fine. most people dont start ev training till after they beat the game. ev training isn't something you should do now. beat the game and then ev train to make your team.