So really... what is Skyridge? Here are the facts:
Set Size: ??? in Japan, 182 in the US
Set Order: 17th and 18th set in Japan, 15th set in the US
Release Date: August 24th, 2002 and October 4th, 2002 in Japan, May 2003 in the US.
Like Aquapolis, Skyridge will be a mix of Japan's last two Card-E sets, namely Card-E 4 and Card-E 5.
Skyridge was the last Pokémon TCG set produced by Wizards of the Coasts, despite how originally two other sets (Legendary Collection 2 and Jamboree) were slated to be released.
The symbol for Skyridge is a mountain thing.