Thia generation introduced a total of 72 new Pokémon , bumping the total to 721 total Pokémon. The list starts with Chespin and ends with Volcanion. There are in total, 31 non-legendary new lines of Pokémon, one new evolution to an old Pokémon family, 3 new legendary Pokémon and 3 new mythical Pokémon.
In addition to the new Pokémon, several old Pokémon received Mega Evolutions. Mega evolution transforms certain pre-existing Pokémon into a new form that improves their stats at the cost of the hold item. X & Y introduced 27 Mega Evolutioms with 20 more introduced in [Pokémon Omega Ruby and Alpha Sapphire|Omega Ruby and Alpha Sapphire.
- Pokémon Battle Trozei
- Pokémon Art Academy
- Super Smash Bros. for Nintendo 3DS / Wii U
- Pokémon Shuffle
- Pokémon Rumble World
- Pokémon Super Mystery Dungeon
- Pokémon Picross
- Pokkén Tournament
The biggest Metagame change is the introduction of the new Fairy Type. Numerous Pokémon were reclassed to this type and several new Pokémon are this type. Other type matchup changes include Steel not being resistant to Dark or Ghost types anymore and new status immunities for other types like Electric types not being able to be paralyzed and Grass-types being affected by spores.
The other big metagame change was Mega Evolution. Several underused Pokémon are now viable and certain stronger Pokémon have alternate uses.
There were some smaller alterations. Several Pokémon had small base stat changes and some had different abilities introduced with this generation. Movepools were altered mostly incorporate the new Fairy type and other new moves. Fire Blast, Thunder, Blizzard, Hydro Pump and similar moves have been lowered from 120 base power to 110 base power. Some moves like Knock Off, have had an increase to 70 base power.