: After becoming the Champion, you can travel to the Kanto region to battle 8 more Gym Leaders and eventually challenge at the top of Mt. Silver. Useful Mechanics
In HeartGold, you encounter many “foreign” trainers — some from Kanto, some from Hoenn in post-game, and others labeled or “Veteran” with Pokémon not native to Johto. The game never treats them as threats. Instead, trading and battling them is encouraged. 4780 pokemon heartgold uxenophobiands
Data miners discovered that Game Freak allocated exactly 4,780 slots for what appears to be a scrapped, highly ambitious "Dynamic Form Engine." : After becoming the Champion, you can travel
4780 - Pokemon HeartGold (U)(Xenophobia) refers to a specific digital release of the Pokémon HeartGold : After becoming the Champion