For starters, train hard. Simple enough. Personally, i'd get rid of swoobat. Waste of time
training that pokemon. If not enough help, try to find a guy named kevben019.

You could train a deino, but since they evolve at such high levels (50-ish, then 60-ish),
another thing is, that your serpirior should know gigia drain, which you covered, leaf
blade, again covered, coil yet again covered, but make it forget wring out, and make it
learn leaf tornado (a man/women in mistralton city will help you delete, or remember a
move). Another tip is, that if your traing a weak pokemon, if it has the exp. Share as
it's item, and is the first in your team to battle, you can switch it out, and when you
defeat the wild pokemon/trainer, the pokemon will get 75% of all experience instead of
50%! Plus if you send out a pokemon with a lucky egg in the same battle, the maximum exp.
Will triple! Hope this helped!!!