|
Technically any time a one-off mutant/alien appeared.
Its pretty obvious the only reason Scumbug, Antrax, Metalhead, Chrome Dome, Mona Lisa, Muckman, Mutage Man, etc. showed up was to sell toys.
That pretty much is also why almost all these characters only ever had one episode. They were not intended to be recurring characters like Leatherhead, Rat King, Baxter, etc.
|