The game took three years to develop, with development costs of $16 million and over one hundred staff members.
The Japanese version has an item called the Magic Shiny Bag, which is obtained by Dabas during the first meeting at Volcano Villude. This item was used in order to play a PocketStation mini-game called "MooGoru Dabas". Since the PocketStation was only released in Japan, the item goes unused. However, if the item is obtained via hacking, its description in the Goods inventory reads "Dabas forced him. Seems useless, but kept as a memento." Through playing the PocketStation mini-game, you could earn Gold and other items and bring them back to your main game.
Winglies appear to be ageless (considering Charlie is over 12,000 years old) and so it's not understandable why their race's popularity is so small.