Pokemon Sea Green Advance is a hack of Pokemon LeafGreen. It is not another boring hack like some others, according to the words of this author.
Basically, nothing in the storyline were changed. The Kanto region appears right before your eyes one more time. This time, it is not the same Kanto Region you used to know anymore… a new one with changes instead.
- Starters changed: Houndour -> Houndoom, Shroomish -> Breloom, Staryu -> Starmie.
- Each starter holds a Lucky Egg when you choose them.
- All Pokemon from Gen I to Gen III are scattered throughout Kanto Region. Not only Kanto but also Johto and Hoenn.
- Wild trainers, gym leaders, elite four… all of them have been edited and altered.