Destroyer

The Destroyer is Robotnik's airship which he used to transform Mobotropolis into Robotropolis.

SatAM
The Destroyer appeared in the intro of Sonic the Hedgehog (SatAM). It officially appeared in the two-part episode "Blast to the Past".

Archie Comics
The Destroyer made its first and only appearance in Issue #43 of Sonic the Hedgehog. It wasn't named, and it wasn't seen again since.

Sonic Underground
A completely different version of the Destroyer was used by Robotnik in the beginning of the first episode of Sonic Underground.