HD-DVD

HD-DVD is a discontinued format that originally competed with Blu-Ray. Season 7, 8, 9 and the movie released on HD-DVD.
== Complete Season Collections ==
Title 	Description 	Note 	Release date
Disney's Sonic the Hedgehog: The Complete 7th Season	"In this adventure Sonic meets Blaze, someone very similiar to himself from another dimension. 
This season has gotten very positive reviews and is worth every second. What a way to start releases on a new format"	Launch title for the HD-DVD 	April 18th 2006
Disney's Sonic the Hedgehog: The Complete 8th Season	"Sonic is back on HD-DVD with more adventures, now travelling to Soleanna to stop a mysterious entity known as "Mephiles""	Exclusive to Walmart 	March 24th 2007
Disney's Sonic the Hedgehog: The Complete 9th Season	"Sonic's final adventure now on HD-DVD. Explore what happends if Eggman wins and so much more." 	Released in limited quantities.	November 24th 2007
== Others ==
Title 	Description 	Note 	Release date
Disney's Sonic The Hedgehog: Knuckles Favorite Episodes	Now on HD-DVD, 7 great episodes featuring Knuckles' personal picks. Classics from the 3rd, 4th, 5th and 6th seasons of Disney's Sonic the Hedgehog.	Only compilation HD-DVD, released at the same time of the DVD release.	July 19th 2007
Disney's Sonic the Hedgehog: The Movie 	"The highly acclaimed movie based on the show finally comes to HD-DVD, includes HD-DVD exclusive bonus features not seen anywhere else." 	Final HD-DVD release. 	April 3rd 2009 (Was supposed to release on January 27th 2009 along with the DVD and Blu-Ray releases but was delayed)