Wikipedia said:Synergy (from the Greek syn-ergo, συνεργός meaning working together) refers to the phenomenon in which two or more discrete influences or agents acting together create an effect greater than that predicted by knowing only the separate effects of the individual agents. It is originally a scientific term.
In a lot of my team rates, I talk about synergy. I just gave you a "dictionary" definition, but what does it mean in regards to Pokemon?
Let's take the team I use now - Deoxys-E, Yanmega, Heatran, Celebi, Garchomp, Lucario.
What is my strategy? Similar to a lot of people today, it's set up rocks, prevent SR from getting set up, dent things (i.e) don't set up until mid/late game, then sweep.
It's a very simple plan, but it's a plan. Every pokemon contributes to that plan, whether it's Celebi crippling things with paralysis or stopping big threats like Garchomp (Celebi does that incredibly well), or whether its denting things for a sweep by something else (Lucario hits even its counters hard, especially since many of them are SR weak), or Garchomp clearing the way with SD Outrage, or Yanmega sleeping and denting things, or Heatran revengekilling, every member of the team has an important place on the team.
Those questions are the most important - is it just 6 OU pokemon thrown together just because they're strong individually?
You must have a plan to win; a plan that is viable under any conditions, at the same time, being able to cover yourself when your plan goes wrong.
Now, let's see - let's take a team like this - this is a team style I often see by not so experienced players.
Baton Passer, Baton Passer 2, random wall, random wall, sweeper, sweeper.
Some may think this is an example of a strategy - boost up, baton pass and sweep. However, the flaw is "what happens if something goes wrong?" What happens if I predict your 6+ 6+ pass to Metagross and fire off a random EQ? What if I bring in a Taunter? Now, your strategy has failed, and because your team doesn't work together outside that one strategy, you are at a major disadvantage. This is why you see people quit after you stop their JaskWak strategy or something.
Pokemon is a game of 6 members of a team- don't structure your strategy around a link of 2 members, to the exclusion of the other 4. (for example, if you want to use a Baton Passer, use one that can support the team beyond Baton Passing (say, a Leech Seed/Reflect Celebi), and can survive for a while (Roost Gliscor), as well as being to Pass repeatedly to different pokemon. Or, like wdro does, you can structure your team to eliminate potential threats to the Baton Pass recipient, like phazers, scarfers, etc.
"Little things" are highly important too. To optimize synergy, a lot of tweaks have to be made - these can be as insignificant as a unique EV spread, a somewhat unorthodox and situational move, or even a change in pokemon. For example, on my ADV Salamence, I run 168 SDef EVs - enough to survive a Swampert's Ice Beam. Why is that important? In general, it can help in the late game to get another hit on Swampert to make it faint, but in particular, my team relies heavily on Baton Passing Swords Dances from Celebi to the rest of my team, and being able to survive an Ice Beam is the difference between beating Swampert to set up the sweep, or losing to it completely and having my strategy fail.
In short, synergy is very difficult to create - let me tell you, for many people, a lof of teams will fail before you hit upon the perfect one, and even that will take a lot of tweaking. I can attest to this.
Now, to discuss - how do you create "synergy" within your teams? Do you look to "cover weaknesses" (does your strategy demand that you not have a particular weakness, etc), what "little things" do you incorporate into your movesets (for example, on my stall team in April, I used Toxic/Roar Heatran because I needed phazing support and Toxic was a good way to hit Garchomp/Salamence/Gyarados on the switch (this was when everything was bulky, before people started using Outrage to plow through everything lol). I think there are a lot of ways to achieve "synergy" within a team, no matter the play or team style.