Pokémon Postcard: Southern Islands "Sky" 1999 Illustrated by Keiko Fukuyama

In Japan, the Southern Islands set was initially released with the second Pokémon movie in two promo folders, each with 9 cards per set (Rainbow and Tropical Island) and decorated artwork. The collection was also released as 3-card box sets. These box sets focused on a particular region from one of the two Southern Islands: Tropical Island and Rainbow Island. 

These postcards were included with the 3 Southern Islands Cards associated with that region.