I realize that Shaymin makes Beedrills 150 hp monsters, but with no warp points, it makes them hard to effectively level up. I'd just drop it for a second uxie and the missing Lux Ball.
If you're playing gengar against a deck that uses like a 2-2 or 3-3 line of Manectric I'm not saying you have a very good matchup, but you'll be in better shape if you leave haunters on the bench and only evolve when you have to attack as opposed to letting them sit on the bench and take damage.
Are you kidding? You'd rather let your main attackers take unnecessary damage than draw one card less with your claydol? You could have gengars with full health, or let them come out with 60 damage or something on them just so you can draw another card?
Or, seeing as Kecleon is already all types he can retreat for free with moonlight anyway! He doesn't need Weavile for free retreat! Yay for reading the card!
Unfortunately there aren't the top 8 decklists like there are for almost any big Magic Tournament. That would be nice.
Anyway, you should definitely try and get staple cards that go in most decks. Bebe' Search, Roseanne's research, Claydol, Rare candy. The front page decklists are good...