- The adventure of the Generation II Pokemon games are more challenging, more difficult.
- The author selected carefully about the number of Pokemon, all types of Pokemon events, all wild trainers with their parties. He did the same things with the items in PokeMarts, the TMs.
- Many mechanical changes like: the EXP bar is longer, the level of wild Pokemon and wild trainers are higher, cannot use healing items in battles, the EV system, no badge boosts, the AI was improved, etc.
- There are some balances of learnsets, evolution levels, base experience, growth rates, catch rates, held items. The usefulness and strength of each Pokemon are also different.
- Some more side-quests and additional events are adjusted. These places are usually located in Kanto.