Pokémon HeartGold Version Unlockables

Interact-able Pokemon
There are a variety of Pokemon whom are available by interacting with them on the map.

Interaction is really the only way to capture these Pokemon in the wild, so take advantage of these opportunities whenever possible!

Listed below are the Pokemon, as well as the requirements for initiating a battle with them:
UnlockableHow to unlock
Sudowoodo (Lv. 20)Use the SquirtBottle on the dancing tree located on Route 36
Lapras (Lv. 20)Available every Monday and Friday within the Union Cave's Basement
Red Gyarados (Lv. 30)Visit Lake of Rage and Surf out to the middle of the lake
Snorlax (Lv. 50)Play the PokéFlute station in front of the Snorlax located on Route 11
electrode (lv.23)in the team roket HQ there are 4 electrode two of which you have to talk to and battle while silver fights the other two.