Pokémon HeartGold and SoulSilver/Special Pokémon

Swarms
Various Pokémon can be caught by listening to Oak's Pokémon Talk on the Pokégear, and then going to the route indicated by Mary.


 * - Route 13
 * - Route 47
 * - Mt. Mortar
 * - Route 35
 * - Dark Cave
 * - Route 38
 * - Route 32
 * - Route 44
 * - Route 1
 * - Vermilion City
 * - Route 34
 * - Route 9 (HG only)
 * - Route 9 (SS only)
 * - Route 3 (SS only)
 * - Route 45
 * - Violet City
 * - Route 3 (HG only)
 * - Route 19
 * - Route 12
 * - Route 27
 * - Viridian Forest
 * - Route 25

Gift
Togepi

The first gift Pokémon you get given is an Egg of Togepi. This Egg is the Mysterious Egg you get sent to collect at the start. After you beat Falkner at the Violet Gym, you will get a call stating that Professor Elm's aide has the Egg for you. He is in Violet City's PokéMart. Hatch the egg and you will quickly discover that the Togepi also has one of Togepi's Egg moves; Extrasensory

Spearow

The next gift Pokémon is technically not a gift Pokémon. In the gate in the north of Goldenrod, you'll meet the Gate Keeper Randy. He will ask you if you can take his Spearow with Mail attached to his friend in Route 31. Accept and he'll give you the Spearow. If you take the Spearow to his friend, he will take the Spearow from you.

Eevee

The next gift Pokémon you'll likely get is Eevee. After bumping into Bill in Ecruteak City, he will return to his house in Goldenrod. Visit him there and he will offer you the Eevee he used to test the WiFi system that he just set up. This Eevee is at Level 5 but does not contain anything else special

Shuckle

After you have beaten Chuck in the Cianwood Gym, go to the south-west house of Cianwood City where you will find a tainer whom is worried somebody will steal his Shuckle. He offers it to you for you to look after his Shuckle. It is holding a Berry Juice. As it isn't your Pokémon, the OT, ID & Nickname will not be of your choosing and will match the trainer and not you.

Tyrogue

If you go into the middle entrance of Mt. Mortar and follow the path all the way down to the basement, you will soon discover the Karate King, the former leader of the Fighting Dojo in Saffron, is there training in seclusion. He will challenge you to a battle and if you win, he will give you a Level 10 Tyrogue.

Dratini

After you have defeated Clair in the Blackthorn Gym, she will send you on a quest into the Dragon.s Den. Deep inside the den you will discover a building with the elders. These Elders will ask you questions about how you raise your Pokémon. After the questions are answered, he will give you a Dratini. If you answer his questions with the compassionate responses, the Dratini will know the special move; ExtremeSpeed. If you don't answer with those responses, it will just know its basic moves

Bulbasaur, Charmander or Squirtle

The second batch of Starters you will find are the Pokémon whom trainers start with when they begin the journey in Kanto. In Heart Gold & Soul Silver, these Pokémon are obtained by visiting Professor Oak after you have obtained all 16 Badges and defeating Red. He will compliment you on your success and provide you one of these Pokémon. As with all starters, they will be at Level 5.

Treecko, Torchic or Mudkip

The third & final batch of Starters you will find are the Pokémon whom trainers start with when they begin the journey in Hoenn. In Heart Gold & Soul Silver, these Pokémon are obtained by visiting Steven Stone in Silph Co. in Saffron City after you have defeated Red. He will compliment you, ask you what colour stone you'd pick and then provide you one of these Pokémon based on the colour. As with all starters, they will be at Level 5.

Trades
Vermilion Gym Leader Lt. Surge will trade with you, but only if you meet the requirements for the Gym Leader Rematch. As his favorite Pokemon is Pikachu, the most likely Pokemon he wants will be Pikachu. In return, he will trade you his French Pikachu (ie. your Pokédex will contain French-language data for Pikachu).