Pokemon Pearl - Pastoria City and the Great Marsh

I went to heal my Pokemon, then headed back to the hotel and the Seven Stars Restaurant to train my Pokemon further against the Trainers of the day. On the way back to the Restaurant, I got TM40 (Aerial Ace) on the path between the city and the hotel. After all those battles, Marcus, Maximus, and Lucius all grew to Level 29. I headed back to the city after that.

Going through Pastoria City, it's less a city and more a town, no real buildings, just houses. When I went in there, I found a Team Galactic asshole mocking me for my few badges, and mentioned having a package to place somewhere. I'm assuming the package isn't a bomb, because that would be WAY too dark for a Pokemon game, but on the other hand I have no idea what it could be otherwise.

Besides the Pastoria Gym, there are a couple things of note here at the city, those being the Great Marsh which acts as Diamond/Pearl's Safari Zone, and the Move Tutor who teaches level-learned moves to Pokemon in return for Heart Scales. I decided to go ahead and check out the Great Marsh, to see if there are any rare Pokemon there I need. I know I'm going to need to visit the marshlands a few times to make sure I get all the new, rare Pokemon that switch out each day.

In the Great Marsh, you only have 30 Safari Balls and 500 steps to take before you're pulled out of the marshlands. Before you go into the Great Marsh, you can go up to the top of the Observation Tower and pay $100 on each of the telescopes to see what Pokemon each area of the marshlands have. When you get in there, you can use a tram to quickly go to the back of the Great Marsh without having to walk all the way there, especially useful as you can sink right into the mud and use a few steps just to get out of there.

When I went in there, one of the people there handed over HM05 (Defog) which they found in the marsh. I took a tram deep into the marshland, and I caught a Carnivine (Grass, Male, Lv. 23) and a Marill (Water, Female, Lv. 25). As I explored further I also caught a Croagunk (Poison/Fighting, Male, Lv. 26) and snagged a Wooper (Water/Ground, Male, Lv. 24) though I think I have one from Sapphire. I'm trying to just grab unique Pokemon, no doubles if I can help it.

After leaving the Great Marsh, I went ahead and decided to challenge the Pastoria Gym.

Current Team:

Alexander (Machoke, Fighting, Lv. 28)
Marcus (Staravia, Normal/Flying, Lv. 29)
Annabelle (Grotle, Grass, Lv. 29)
Maximus (Luxio, Electric, Lv. 29)
Lucius (Ponyta, Fire, Lv. 29)
Maria (Shellos, Water, Lv. 28)