Re: Training Help
Use that Lucky Egg the professor gave you and take your monsters to the grassy area in Victory Road/Route 10.
Move around outside the grass until it shakes and take advantage of the fantastic EXP granted by Audino.
It's my tried and true favourite way to level a monster.
Once you've beaten the E4 the first time you can then take on the Audinos in Giant Chasm (which I believe are the highest levels available for them).
As others have said, simply throw some variety in your movesets.
You have Special Attacking fire type?
Throw on a Flamethrower and then fill the other slots with other Elements.
I'm no tactician, but this is how I made it through levelling,