From Sonic Retro
Swatbot, Sonic Underground. The Swatbots appear in the TV series Sonic Underground. They come in several variations, use multiple vehicles and weapons, and all have orders to capture any Freedom Fighters. However, these SWATbots are very weak, being able to be destroyed by water or laser blasts and having an easily accessed control panel on their arm to give them a small shut down. The Swatbots of this series sound more robotic than past appearances. They were all voiced by Maurice LaMarche.
Sonic Underground LCD Game
Swatbots make their first game appearance in the Sonic Underground LCD Game where they are the most common enemy. It is best to use Knuckles the Echidna as he can deal with them quickly do to his strength. In the game, they attack by blasting lasers from blasters on their arms. In the final boss battle Dr. Robotnik can call a small army to attack the player.
Sonic the Hedgehog Archie Comics
In the Archie comics series, there are supposedly improved models of SWATbots called Shadowbots, created by Robo-Robotnik. He claims they are superior to their predecessors, but a past conflict between the original Robotnik's SWATbots seemed to prove otherwise. Shadowbots usually sport a metallic black color, much like their TV show counterparts. The Delta-class Shadowbot was soon replaced by a larger, more destructive model dubbed the Gamma-class Shadowbot. Eggman has unleashed what he calls "SWATbot Mk IIs" as of late, but so far there do not appear to be any major improvements made over the Gamma-class.
Sonic the Hedgehog TV Series
Sonic Chronicles: The Dark Brotherhood
SWATbots make an appearance as enemies in Sonic Chronicles: The Dark Brotherhood along with stronger versions named "SWATbot Mk.II" which serve as an Act 3 boss. A SWATbot which has lost it's programming also appears and remains neutral unless the player reminds it that it works for Eggman. At that point a battle will ensue.
The Combots are superior versions of the SWATbot model. Far more intelligent and capable of camouflage, they are the ultimate military robots. Many are in service to Crocbot, the sub-boss of Downunda. They despise the inferior SWATbots, one of the few signs of open intelligence among Robotnik's robot army.
A highly adaptable robot model, the Dynamic 3000 can transform to fit any given situation. As such, it is the ultimate unit of the SWATbot class. The Dynamic model is so powerful that the only way to defeat it is by shorting it out through a massive electric shock. One Dynamic 3000 was dispatched by Robotnik to serve as sub-boss of the western sector of the Knothole continent, but it was destroyed by the Freedom Fighters before any permanent harm was done.