Pal Park is an area located on Route 221, which is south of Sandgem Town. It becomes available after you obtain the national dex from Professor Oak. In order to obtain the National Dex, you must have SEEN all 150 pokemon that are in the Sinnoh Dex. (151 if you have seen Manaphy). This is actually quite possible to do as long as you battle every trainer in the game. The 2 most missed pokemon in the sinnoh pokedex are Wormadam and Drifloon. A Wormadam is held by a Beauty on Route 214. Drifloon, is however harder to find, unless you like to fight. In the 5th gym, with ghosts, you will have the option to skip the starting trainers, however, one of them holds the ONLY Drifloon you will see in the game, except the ONE wild one that appears during friday mornings and days at the WindWorks. Keep in mind, about 20 or more pokemon will not appear in the game until you reach Victory Road, and about 5 will not appear until you defeat the Elite 4 and the Champion. When you have seen 150/151 pokemon in the Sinnoh Dex, head back to Professor Rowan's lab in Sandgem Town. You will be greeted by Professor Oak, who, after a little time, will upgrade your pokemon to national mode, and you will be given the Pokemon Radar, which allows you to encounter National Pokemon in most grassy areas. He will also invite you to the Pal Park.
I have the National Dex, What Now?
Ok, now that you have the National Dex, you may access Pal Park. It is accessed through the same town you are in, Sandgem Town. First off, head south to that beach that you probably saw when you first started, but never knew where it went. Follow that route on top of a pokemon that knows Surf, and you will reach land shortly after. After walking on the land (and battling trainers, like when you had to Surf), you will arrive at a building. Enter, and Professor Oak will welcome you to Pal Park before promptly leaving to go to Eterna City. Welcome to Pal Park! As you can tell by talking to the people inside, everyone is a big fan of you and can't wait to see a "Catching Show" from you.
I'm in Pal Park, What Now?
After arriving in Pal Park and talking to Professor Oak, walk up to the counter and talk to the employee there. He immediately recognizes you as the League Champion, and asks you to participate in a "Catching Show" in which you transfer pokemon from FireRed/LeafGreen/Ruby/Sapphire/Emerald by inserting them in the GBA slot and selecting Migrate from ____ at the D/P opening menu. (This can only be done if you save AFTER you talk to the employee.) There is also a girl in Pal Park in the Southeast part of the building that will give you the final two Poketch applications, the Kitchen Timer and Color Changer, if you show her a Snorlax and Kecleon, respectively, and in order.
I've Selected the 6 Pokemon to Migrate, but how do I?
Ok, first off, after saving, restart the game, there will be a new option on your opening menu, which states Migrate from ____ (Whatever GBA game is inserted in your DS). Click it, press yes if you wish to migrate, it will explain that you can NEVER bring the pokemon back to your GBA game, press Yes again if you are ok with it. After that, you will be brought to your GBA boxes, simply select the 6 pokemon you wish to migrate and it will bring up a confirmation screen. Press yes and yes again to save both the GBA and the DS games.
I've Migrated, Now What?
When you log back into Diamond or Pearl, talk to the employee, he will ask you if you want to do a Catching Show, say yes and he will present you with 6 Park Balls. These Park Balls have a 100% catch rate of pokemon inside of Pal Park, so there is absolutely no chance of you losing pokemon you transfer over. When you get inside, Pal Park is split into 5 areas. The Area In The South, The plains, is where pokemon that wouldn't fit into the other areas would come here, such as Rayquaza. The Northwestern corner of the area is the forest area, the most
common pokemon you will find here after transferring are things from the forest in the GBA games, such as Caterpie, Pikachu, Shroomish. In the Northeastern part of the park is the lake, in which requires a pokemon that knows surf in order to encounter wild pokemon on. Pokemon such as Marills that wouldn't be in the sea, but would be in water will be located at. The Middle Part, Otherwise known as the mountain region, is there pokemon like Geodude, Aaron, and Groudon would call their home. The final area of Pal Park is in the Southeastern part of the park. This is the sea, and it too requires you to have a pokemon with surf in your party. Pokemon such as Kyogre would be located here. After catching all 6 pokemon, you will leave the park and you will get a berry as a reward if you catch them all within a certain amount of time.
