You find yourself in your room, when you go downstairs your mother tells you that Professor Elm has something to talk to you about. When you arrive he asks if you can pick up an item from Mr. Pokemon, after you agree he lets you pick from Chikorita, Totodile and Cyndaquil to help you on this errand. You find out it’s a Pokemon egg, on your way back you meet a red haired boy who challenges you to a battle, after you defeat him and return to the lab you learn that the boy had stolen a Pokemon from Elm. When the professor sees the egg he is astonished, he allows you to keep the Pokemon and encourages you to test your skills by challenging the Gyms across the region.
In the world of Pokemon there are 17 different types: Normal, Fighting, Water, Grass, Fire, Ice, Electric, Rock, Ground, Poison, Bug, Psychic, Flying, Dark, Ghost, Dragon and Steel. Pokemon can have up to two types, gaining both the advantages and weaknesses of both types.
This is a list of all the major changes between the original G/S and HG/SS.