What are the major changes or additions that occurred every generation?

Question

Here's the ones that came to mind immediately:

Gen I: Uh... Pokemon Battling
Gen II: The Special Defense Stat
Gen III: Abilities
Gen IV: The Physical/Special Split
Gen V: Hidden Abilities
Gen VI: Mega Evolution

Are there any other major changes between generations that I missed? Thanks!

Answer 1

Update for Gen 8

Gen 1

• Pokemon as a whole!
• Kanto
• 15 types
• Evolutions
• Evolution stones
• General Pokemon stuff
• First 151 Pokemon
• 165 moves

Gen 2

• Johto
• Special Defense/Attack
• Steel and Dark type
• Real-time events
• Other changes to the type chart; notably Bug and Poison are no longer super-effective against the other, Psychic lost it's immunity to Ghost, and Fire now resists Ice
• 100 new Pokemon
• 86 new moves
• Gender
• Breeding
• Friendship
• Held items
• Pokerus
• Shiny Pokemon
• Seven new Pokeballs
• Berries
• Added Sun Stone
• 2 additonal storage boxes

Source

Gen 3

• Hoenn
• 76 Abilities
• Double Battles
• Contests
• Upgraded EV system
• Weather
• 135 new Pokemon
• 103 new moves
• Changes to determining shininess
• Battle Frontier
• 43 new berries
• Seven new Pokeballs
• 10 extra spaces in each storage box
• Secret bases

Source

Gen 4

• Sinnoh
• Physical/Special split
• Status class
• New stone evolutions given to old Pokemon
• Added Dawn, Dusk, and Shiny stone
• Return of real-time events
• 5 new Pokeballs
• 107 new Pokemon
• 113 new moves
• 47 new abilities
• Pokemon can now have multiple abilities
• 4 new boxes in storage system
• Pokemon following

Source

Gen 5

• Unova
• Hidden Abilities
• Hidden Grottos
• Upgraded sprites and move animations
• 1 new Pokeball
• 156 new Pokemon
• 92 new moves
• 41 new abilities
• Triple battles
• Rotation battles
• Dark grass
• Phenomena
• Seasons
• Pokemart and Pokecenter are located in the same building
• Changes to battle music depending on what is happening
• Infinite usage TMs
• 6 new storage boxes added

Source

Gen 6

• Switched from 2d to 3d
• Fairy type
• Upgraded type chart
• 48 Mega Evolutions
• Character customization
• 72 new Pokemon
• 62 new moves
• 27 new abilities
• 8 directional grid
• PSS
• Sky battles
• Horde battles
• Inverse battles
• Super training
• Chain fishing

Source

Gen 7

• Alola
• Rideable Pokemon and removal of HMs
• 81 new Pokemon
• 98 new moves
• 41 new abilities
• Regional forms
• Rotom Pokedex
• Seeing stat changes during battle
• Island Challenge instead of Gyms
• Battle Royal
• SOS Calling/Chaining
• Hyper Training
• Ice stone
• 1 new Pokeball
• Return of music changes depending on the time of day

Source

Gen 8

• Galar
• Dynamaxing/Gigantamaxing
• Changes to Pokemon breeding, such as transfering moves
• Return of Pokemon following you
• Pokemon camp and curry
• 81 new Pokemon
• 54 new moves
• 25 new abilities
• 19 new regional forms
• Y-Comm

Source

Answer 2

Here is what I know.

Gen I: Pokemon Battling,evolution.

Gen II: The Special Defense and Special Attack Stat,experience bar shown in battle,pokemon eggs,evolution through happiness ,gender(thanks to relic castle king),breeding,day care.

Gen III: Abilities,Double battles.

Gen IV: The Physical/Special Split. Evolution through certain moves,pokemon following you.

Gen V: Hidden Abilities, triple battle,rotation battle,shaking grass,rippling water,dust spots,TMs can be used multiple times instead of once,moving Pokemon battle sprite.

Gen VI: Mega Evolution,sky battle,horde battle,inverse battle,soaring,wonder trade,supper training,pokemon amie,O power,dex nav,news nav,ridding on Pokemon.

Comments

This will get BA if no one answers for a day. Thanks!

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Aalso, happiness evos were in gen II with Espeon and umbreon

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Gen 2 genders

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I completely forgot about espion and umbreon.thanks radicool

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whats soaring o.0

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You dint play ORAS

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Would another thing for gen 3 be contests? :P

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Here's some things you missed and things you got wrong
- Gen 1 actually started Day Care
+ But you were right with the Gen II  starting the breeding
- The walking with the Pokemon business technically started in Gen 1 with Pokemon Yellow
+ In Gen IV, they started with the GTS as well
+ In Gen II, they aslo introduced Baby Pokemon into the games
+ And in again in Gen II, they maximized the space in the Bag compared to the Bag in Gen I

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Back then, before like Gen III, they didn't have items.

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Gen 2 held items

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MechSteelix, if you go back now and play Gen I and Gen II, they indeed had items you pick up on the roads and put into your bag like any other regular Pokemon game. TM's, Potions, Poke Balls, e.t.c.

Answer 3

Each gen there are new Pokemon, gyms, new story/gameplay, newly introduced stuff (like mega evolution), new characters and more!

Each gen also introduced new legandarys.