Might as well get going on this...
I actually just beat the E4 for the first time in White last week. I seem to stay about one generation behind and never quite catch up, in part because I play all the games and I play them for a lot of hours - over 300 so far on White, and I haven't even done any of the post-E4 stuff. But I started Black the other day and for now I'm just tending my White Forest and otherwise leaving White alone, mostly because I'd sort of like to try to get to Icirrus in Black before the end of the month, so I can get the winter-only stuff out of the way then, since it won't be winter again until March. I'm not sure if I'll make it though.
So - in Black. I've got one Badge, and am currently hunting outside Pinwheel Forest. Just the other day, I figured out what Synchronize does outside of battle, after I caught five Serious Sawks in a row. At first, I thought there was something wrong with my game, and I was trying to figure out what it could possibly be, and for that matter, how in the world I was going to be able to finish the game if all the pokemon were Serious. Then I noticed that my Munna, which I had in the lead so she could Yawn the Sawks, was Serious and had Synchronize, and I took a guess that turned out to be right - outside of battle, Synchronize increases (to 50%) the chance that a wild pokemon will have the same nature as the Synchronize pokemon. So I immediately went back to the Dreamyard and started catching Synchronize Munnas. About the fifth or sixth one I caught was an Adamant, so I took it back to Pinwheel Forest, and I did catch a pretty nice Adamant Sawk, but the more I thought about it, the more I decided that what I really wanted was a Jolly. Though I did want an Adamant Timburr. And for some reason, it took me forever to catch a good Adamant Timburr, but I finally did it last night. Then I went back to the Dreamyard to try to catch a Jolly Synchronize Munna. And as long as I was there, I was keeping an eye out for a really nice Jolly Purrloin, just because I wanted one. And this morning, I found both of them, one right after the other. The Munna is just a Munna - I don't even know what its stats are - it's just Jolly and Synchronize. The Purrloin was level 10, female, Jolly, with at least mid-20s in everything important. And, being a Purrloin, she almost immediately got one-shotted by a Patrat. But it's not like I'm nuzlocking or anything, so I just smiled a bit and hauled her little kitty butt to the PC and got her patched up, then went back to Pinwheel Forest, with the new Jolly Synchronize Munna in the lead, to hunt for a good Sawk. And that brings me up to the moment. When I get done futzing around on the 'net, I'm going to go back to catching a good Sawk, and then go punch the rock, then put together a team to actually go into the forest and start hunting Venipedes and Cottonees and such...