 While there were some GI JOE/Transformer crossovers in the comic  books there were no crossover episodes between the two shows until  the third season when a character voiced by Chris Latta (qv) named  Snake makes an appearance as an arms dealer wearing a trench coat,  hat and a mirrored mask over his face. At the end of the episode he  screams, "COBRA!" the battle cry for Cobra Commander