Final appearance of Blaster, Predaking, the Predacons, Skylynx and the Sweeps; though Scourge would continue to appear in season 4.
Optimus's line "That's because I know you too well Galvatron'. Implies that he is aware, Galvatron was originally Megatron. With the exception of the episode 'Dark Awakening', this is the only episode where the two have any interaction.
In a character trait that differs from Megatron. Galvatron would refer to Optimus Prime as 'Optimus', rather than call him 'Prime' as Megatron did. Only in Transformers; The Movie did Galvatron ever simply call him Prime.
Skylynx's toy was originally an unreleased product by a rival toy company to Takara called Toybox. It did not see a release in Japan, during G1's toy run. When the Headmasters series debuted, Skylynx was omitted from the series. His partial role as the Autobot combatant to the Predacons, was instead replaced by the newly introduced Trainbots.
Later, Toybox would be acquired by Tomy. When Tomy and Takara merged , Takara finally had legal access to the toy mold. And released it in their Transformers line.