Pokemon Heartgold Version Case and Game Manual : Pokemon Company, Nintendo : Free Download, Borrow, and Streaming : Internet Archive

Scans of the DS game case and the manual.

The official Pokémon handbook : Maria S. Barbo : Free Download, Borrow, and Streaming : Internet Archive

Pokémon: Indigo League - The Complete Collection (4Kids Entertainment - English dub) : Nintendo, OLM Inc., 4Kids Entertainment and The Pokémon Company International : Free Download, Borrow, and Streaming : Internet Archive

NDS Game US Version of Pokomon HeartGold & SoulSilver DS for NDS NDSI 3DS

Why does GameFreak/The Pokemon Company offer many seasons of the series Pokemon on Pokemon TV for free to watch? Isn't that a big loss of money? - Quora

Pokemon Heartgold Version Case and Game Manual : Pokemon Company, Nintendo : Free Download, Borrow, and Streaming : Internet Archive

The complete Pokémon pocket guide : Inoue, Kaori, 1962- : Free Download, Borrow, and Streaming : Internet Archive

Pokemon Heartgold Version Case and Game Manual : Pokemon Company, Nintendo : Free Download, Borrow, and Streaming : Internet Archive

Pokémon Journal of Geek Studies

Pokémon Heart Gold Version (USA) : GameFreak : Free Download, Borrow, and Streaming : Internet Archive