Pokemon Scarlet and Pokemon Violet are the first true open-world mainline Pokemon games in the franchise. Generation 9 does away with Random Encounters, which have been the only method of battling/catching wild Pokemon since Red/Blue/Yellow. Now, every Pokemon is visible in the overworld and must be physically approached to battle. This includes Shiny Pokemon, which can now be seen roaming freely, much as they could in Pokemon Legends: Arceus.