Megano again to ask another question relating Piranacon, i wanted to know why he was NEVER in the series. Of course he was later in the seasons so i dont think they could've fit him in, but he's the only scramble city combiner to never have joined the show.
Pretty much this i'm affraid. It would have been so amazing if we had gotten a cartoon till 1994. The franchise would look very different know if we had, but unfortunantly things didnt work out that way. There's still BW Neo or II, i dont remember where God Neptune starred in.
As you said, the figure was released when the show was already cancelled. The seacons and Piranacon did feature in the Marvel comics, however. They were quite powerful in the US run at one time lifting up an entire spaceship (although as individuals they had a hard time fighting Blaster), while in the UK run Galvatron beat the shit out of him.
It would have been awesome to see him in the episode call of the primitives or even his own origin episode. The only way to see him in action is in MasterForce and in that the seacons plays the role as the expendable henchmen.
There where alot of other SC combiners not in the show. I would name some, but then I wound be able to stop.