Tropi Archipelago (一連群島 Ichiren Guntō, lit. Chain Archipelago) is a large chain of tropical islands. It is the newest addition to the Hora Region, having joined only recently. It is located south-west of mainland Hora. These islands do not have a League of their own as they are with the Hora Region, sharing the Hora League.
The Tropi Archipelago is based off of the Hawaiin Islands both in formation, location, and in that the Tropi Archipelago is the newest addition to Hora just like Hawaii is the newest of the U.S. states.
Due to the islands tropic nature, some Pokémon are colored differently, while not being Shiny. An example of this is Jason's Butterfree, who originated from these islands.