Another Trilogy FTW. I think. I duno if this one's all that great.
So yeah, competitive Trainer. Which means using tactics. Like these. For the most part anyways. However, you don't have to do a Trainer with six Pokemon necessarily, it is possible to do just some competitive Pokemon. Yes, they must be legitimate. Use the awesome upgraded Moveset Calculator to find out the legitness of your Pokemon!
Xatu
Lagging Tail
Synchronize
-Power Swap
-Guard Swap
-Trick
-U-Turn
I call it the Identity Swapper, because all it does is trade and flee. It is trained only in Speed EVs, so that the extremely low Stats of the two Attacks & Defenses can be traded away with Power/Guard Swap, respectively, and it's holding a Lagging Tail to Trick away to the opponent. There's really no point in Skill Swap, because it doesn't have a hindering ability. So, I gave it U-Turn so it can make a getaway after ripping the opponent off while damaging them too. It also works to get away from Dark types.
So yeah, competitive Trainer. Which means using tactics. Like these. For the most part anyways. However, you don't have to do a Trainer with six Pokemon necessarily, it is possible to do just some competitive Pokemon. Yes, they must be legitimate. Use the awesome upgraded Moveset Calculator to find out the legitness of your Pokemon!
Xatu
Lagging Tail
Synchronize
-Power Swap
-Guard Swap
-Trick
-U-Turn
I call it the Identity Swapper, because all it does is trade and flee. It is trained only in Speed EVs, so that the extremely low Stats of the two Attacks & Defenses can be traded away with Power/Guard Swap, respectively, and it's holding a Lagging Tail to Trick away to the opponent. There's really no point in Skill Swap, because it doesn't have a hindering ability. So, I gave it U-Turn so it can make a getaway after ripping the opponent off while damaging them too. It also works to get away from Dark types.

