Changes from Gen 1 to Gen 2: 

  - 100 new Pokémon (pre-evolution and evolved forms of Gen 1 included)

  - 86 new moves (total is now 251)

  - Dark and Steel types added

  - Johto region

  - Genders for Pokémon and breeding

  - 7 new types of poke balls made from fruit

  - Built in clock that allows for in-game events depending on time of day / day of week

  - Shiny Pokémon

  - Friendship introduced in Yellow, is a stat used by all Pokémon

  - Pokémon can now hold items and use them in battle

  - Pokémon virus... Apparently this is a thing

  - Special Attack and Special defense split

  - 4 containers instead of 1 in your bag plus Pokegear

  - Can now use HM moves by interacting with an object

  -Exp. Share is a held item

Gold and Silver Story:

  - Start in New Bark Town 3 years after Pokémon red and blue

  - get an egg, red hair boy steals one of the starters

  - Slowpoke tails, Kurt, team rocket is back

  - Meet Bill, get an Eevee

  - Red Garydos, Lance

  - Team rocket tries to connect to Giovanni, you fight them through the radio tower, Red hair boy is there

  - You disband team rocket, victory road, defeat red haired boy,

  - go through Kanto, beat Red

Favourite Pokémon

Pokémon Crystal:

  - Female choice for the player

  - Animations for all Pokémon

  - Battle Tower, Move Tutor, Online Capabilities

  - Event Pokémon that could be caught

  - Legendary Pokémon are part of the plot