Pokémon Gold and Silver/New Stuff

Pokémon Gold and Silver introduce:


 * 101 new Pokémon to the game
 * A day and night system
 * Days of the week
 * A phone
 * A radio
 * Colour
 * Many new moves
 * The dark and steel type of Pokémon
 * A PokéGear (with a built-in map)
 * Roaming Pokémon e.g Suicune
 * Decorating your room
 * Hold items
 * Evolution by holding an item
 * Clocks
 * Registered Items
 * Printing (from the Game Boy Printer)
 * Lottery Corner
 * Apricorns (can be used to make special Poké Balls)
 * Pockets in the bag
 * Pokémon Eggs
 * Mystery Gift (via infra-red)
 * Shiny Pokémon
 * Pokérus

New features in Crystal include:


 * Animated Pokémon graphics
 * A choice of boy or girl
 * New Suicune quest
 * New Ruins of Alph quest
 * A new Battle Tower located west of Olivine City
 * New ways to get Ho-oh and Lugia
 * Features Suicune (Gold features Ho-oh and Silver features Lugia)
 * Many Pokémon have move changes
 * Daycare lady gives you an Odd Egg, Pokémon in it has a special move as well as a 50% chance of being shiny
 * When you enter a certain area, a sign will appear at the bottom of the screen telling you where you are
 * New Mobile Adapter (only for Japanese version)
 * A way to get Celebi using the GS Ball (only for Japanese version)
 * Features the very first Move tutors
 * New function in the PokéGear called Buena's Password
 * Trainer's calls are now more detailed, and won't always ask to battle
 * Some trainers will give you evolution stones for free if they call you
 * A new Pokémon Seer appears in Cianwood City
 * In-game trades has been changed
 * Graphics in caves has been updated, Ice Cave and Dragon's Den's graphics have been updated quite a bit