At the following Internet Archive link are well-preserved VHS recordings of the four editions of Super Sunday, airing in December 1985. Each episode contains a 5-6 minute segment of Jem, Bigfoot And The Muscle Machines and Robotix.
Internet Archive: Super Sunday
01/12/85
Jem: MP 4042-B, The Mansion (Episode 5)
Bigfoot And The Muscle Machines: The Final Battle, Episode 9
Robotix: MP 4039-A, Episode 13
08/12/85
Jem: MP 4042-C, The Yacht (Episode 6)
Bigfoot And The Muscle Machines: Cryptic Cargo, Episode 1
Robotix: MP 4039-B, Episode 14
15/12/85
Jem: MP 4043-A The Video Clip (Episode 7)
Bigfoot And The Muscle Machines: Episode 2
Robotix: MP 4039-C, Episode 15
22/12/85
Jem: MP 4043-B Defections (Episode 8)
Bigfoot And The Muscle Machines: Episode 3
Robotix: MP 4035-A, Episode 1