Delta Species

The Delta Species is a collection of Pokémon exposed to strong magnetic forces. The Pokémon developed abnormal typing compared to those of their regional counterparts. The severity of these changes depended on the amount of exposure. The neighboring islands in the Holon archipelago are exposed to lesser amounts of magnetic force but still developed abnormally.

The exposed Pokémon did not develop any changes to their original weaknesses or design. These strong magnetic forces generated auras around the Pokémon reflecting its type. For example, Larvitar migrated to these islands as a Ground-type with weakness to Grass-type. On the main land, Holonian Larvitar that lived in caves developed into a Fire-type Pokémon but still has the same weakness.

After the Holon Research Tower incident, the immense electromagnetic radiation strengthened which caused severe reactions to the local Pokémon species. Pokémon that evolved near this tower begun exhibiting Electric-type or Metal-type traits. On nearby islands with less exposure, Holonian Larvitar developed into an Electric-type Pokémon but still with to its original weaknesses.

This is a complete list of Pokémon originally from the Holon region.