ITT: CP (Competitive Pokemon), advice for newbies and rate my team.

I was playing a Rating Battle (my rating is around 1560) and I had a battle with this guy who handed my ass to me. Then I felt very frustrated at how I suck at this game. I really want to get better, and I think I need some advice in team building and synergy.

Post those big informational pictures, and rate other people's team, I don't know.

My team is:
Meowstic (Prankster) @ Light Clay
- Swagger
- Thunder Wave
- Reflect
- Light Screen

Reuniclus (Magic Guard) @ Sitrus Berry
- Psyshock
- Calm Mind
- Recover
- Trick Room

Goodra (Hydration) @ Weakness Policy
- Dragon Pulse
- Muddy Water
- Rain Dance
- Rest

Dragalge (Poison Point) @ Leftovers
-Dragon Pulse
-Venoshock
-Shadow Ball
-Toxic

Galvantula (Compound Eyes) @ Life Orb
- Thunder
- Bug Buzz
- Energy Ball
- Protect

Mawile (Intimidate) @ Mawilite
-Iron Head
-Play Rough
-Fire Fang
-Sucker Punch