: The hallmark feature of HeartGold—having your Pokémon follow you in the overworld—is fully implemented.
: Despite being unfinished, Heart Red is often recommended as a foundational "base ROM" for other hackers who wish to build Kanto-based adventures on the DS engine. Gameplay Mechanics at a Glance Implementation Base ROM Pokémon HeartGold (US) Region Kanto (remade with DS graphics) Graphics Gen 4 style with updated sprites Difficulty Generally follows FireRed level curves Technical
: While it keeps the Kanto story, it utilizes Gen 4 mechanics, including better sprites and the Physical/Special split .