Pokémon Diamond and Pearl/Route 204 & Ravaged Path

'''Route 204 is split into to parts with Ravaged in the middle. It connects Jubilife to Floaroma and I'd home to some new Wild Pokémon to catch.

Route 204 south side
After resolving the issue between Professor Rowan and Team Galactic you can head north into the south side of Route 204

This part is straightforward as you only need to head north where you will bump into Lass Sarah, Youngster Joey, and Lass Samantha to battle. You can also catch a Budew and a Wurmple, Platinum only.

Trainers
* You can rebattle Lass Samantha with a Vs. Seeker. To see her Pokémon go to Rematches
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Swarm, dual slot and Poké Radar Pokémon aren't available until you get into the Hall of Fame

Pokémon found

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Items

 * Paralyze Heal - On the east side of the fence through grass and north of the first pond on the right
 * Sea Incense(Surf required) - Across the water in the southwestern part of the route
 * Sea Incense(Surf required) - Across the pond in the southwest part of the route.
 * HP Up(Surf required) - Across the second pond on the right

Ravaged Path
From here, all you need to do is go to the right and use Rock Smash on one of the rocks. On your way out you will find an antidote in DP or a potion in Platinum. Exit through the newly accessible doorway.

You may also go to the left to pick up some valuable items, although most items cannot be reached until you can use Surf outside of battle.

To get to the items you need to Rock Smash through the left part of the cave. Before you surf you should see TM39. Surf and stay on the left side until you get to land again then stick to the left wall and follow the path to the end to find the Luck Incense. Now take the first path left and jump down the ledges to get to the water again. Surf to the northeast corner and you will find TM03.

Pokémon found

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Items

 * Antidote(DP only)- northeast of the stairs
 * Potion(Platinum only) northeast of the stairs
 * TM39 (Requires Rock Smash) - in the left part of the area before the water.
 * Luck Incense(Requires Rock Smash and Surf) - at end of path from left part of the lake
 * TM03 (Requires Rock Smash and Surf) - northeast corner after lake

Route 204 north side
Once you exit Ravaged Path you will be back on Route 204 but in the northern side. It's a backward S shape. Head up the stairs follow the path right to find an awakening and then run into Aroma Lady Taylor, Bug Catcher Brandon and Twins Liv & Liz. The twins are an unavoidable double battle so be prepared to face two Pachirusus. After the trainers there will be fences to you left and right. To your left in between the fences is TM09 and to your right behind a cuttable tree there is a woman who will give you TM78. Once you collect those items head north and you will be in Floaroma Town

Trainers
* You can rebattle Bug Catcher Brandon. To see his Pokémon go to Rematches
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Pokémon found

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Items

 * Awakening - Up the stairs and to your right
 * TM09 - in between the two fences on the left
 * TM78 (Cut required)- in an alcove past the cuttable tree given by a woman