I played through a lot of Diamond yesterday, so here's just a brief summary of what happened.
-Caught a new team member, Nabooru the female Hippopotas
-Swept Maylene's Gym with mostly Gawky (Mr Mime), though I did use Mira (Floatzel) against her Lucario to take it out with Dig.
-Defeated Crasher Wake with a combination of Gawky and Turpleturt (Grotle)
-Travelled to Celestic Town. Turpleturt and Nabooru evolved while grinding for Fantina.
-Destroyed Fantina with Soren (Murkrow) and Nabooru
Anyways, I'm a little underlevelled for Byron (with Turpleturt and Soren being my highest-levelled team members), so I decided to travel south of Sandgem to grind. I'll be trying to stay a little underlevelled before I get the opportunity to get a Dusk Stone, as I don't really want Soren to pass level 45 before he evolves- I want to make sure to get Night Slash. However, I decided to look up Torterra and Floatzel's movesets, and decided to alter them a bit- I replaced Mira's Aqua Jet with Surf, as I wanted a stronger move at this point (despite Floatzel's meh Special Attack), and brought her and Turpleturt to the Move Relearner to teach them Ice Fang and Wood Hammer respectively.
Because of that, I also shuffled around items. I took Turpleturt's Quick Claw off him to replace with a Shell Bell, and decided to give it to Nabooru instead.
EDIT: I managed to defeat Byron, and while I fought him, Turpleturt got Synthesis. This will be fun with Wood Hammer. I cleared through Lake Valor (long story short, Soren made quick work of everyone), and I decided to go up to Route 216 before returning to Twinleaf so that I could capture my final team member- Krystal the Sneasel. Yes, I know this gives me two Dark-types, but there are very few Pokemon in Sinnoh I've never actually used, and she was my top pick.
EDIT: After grinding a bit, I decided to take on Candice- and I was actually expecting it to be much harder than it was (though part of that was likely me remembering her Platinum team rather than Diamond). Because a lot of my team's weak to Ice, I decided to send out Krystal first in the hopes that she'd be able to take on her first Pokemon- which was a Snover, thankfully. Though she was weakened with Avalanche, and though Candice healed it once, three X-Scissors were enough to take it out. She switched to her Medicham next, and although Krystal had Shadow Claw (and a Spell Tag to boost its power), I wasn't willing to trust my luck. Instead, I switched to Soren, who OHKOed it with Fly. Her own Sneasel was next, so I switched Krystal back in and, once again, used X-Scissor to take it out (once again, it healed- and because Krystal was a little low on HP, I healed the same turn).
Things started going a little downhill when I fought her Abomasnow. Completely forgetting that Ice resisted Ice and, because of that, it was neutral on Abomasnow, I decided to chance using Mira. I realised my mistake as soon as I used Ice Fang and it barely did anything to it. Though I tried to heal, hoping that Abomasnow didn't have any Grass-type moves and would just spam Avalanche, I tried to heal, but she was taken out by a Wood Hammer.
I was a little concerned here. I wasn't sure if any of my team members could do anything to take it out in one hit, seeing as the only moves my team members had that it was weak to were on Pokemon it could easily destroy- those being Soren and Krystal. Because Soren had more HP, I decided to chance taking it out with Fly, and if he fainted, finishing the job with Krystal. Thankfully, it was enough- Fly took out the remaining half of its health and got me the Badge.
After that, I decided to teach Turpleturt Rock Climb. Though I am disappointed that I had to get rid of Curse to do it, I can easily delete it once I'm done with Mt Coronet and reteach him Curse.
Oh, and I just managed to evolve Soren at long last!
Current team:
;389; Turpleturt, level 40 (Male)
;419; Mira, level 40 (Female)
;430; Soren, level 41 (Male)
;122; Gawky, level 40 (Female)
;450; Nabooru, level 40 (Female)
;215; Krystal, level 41 (Female)
The lack of gender balance in my final team will annoy me a bit, I have to say, but it was worth it- I love female Hippowdon.