X-Sabers are usually the best to me, but it depends on your style.
Best- Lightsworns, Blackwings,Shooting Star, Red nova,
AND X-SABERS+XX-SABERS deck!
(I prefer an exodia deck, just saying)
synchro, gladiator, blackwing
In my opinion,a good synchro deck should have a mix of attributes whereas the monsters should be a mix of attack defense.
You can have up to 15 synchro's or fussion monsters total in your extra deck.
you cant
yuma the plant woman is a good synchro monster for a plat deck..........and dandelion is just a good card
Synchro Monsters are placed in the Extra Deck along with the Fusion Monsters at the beginning of a Duel.
I think its the five dragons synchro monsters I believe the most powerful deck of 2009 is lightsworns because the winner of the last 2009 tournament used a lightsworn deck. You can check the tournaments on yugioh wikia.
The best deck for this card would most likely be a beast or an EARTH deck.
Synchro cards are supposed to be held in the extra deck.
you should be able to buy it at this web address British bob yugiohcards.net have fun!
You may have a total of 15 fusion and synchro monsters in your extra deck(renamed from fusion deck with the addition of synchro monsters)
Knowing the game well and how to play it is a key to winning Yugioh. Also, having a good deck and using strategy helps.