Yeah but the Matrix of Leadership wasn't around yet in the cartoons. So techincally this was first. I'm posting Devestator's first appearance which I think was #10 and after that the conclusion just of the Shockwave scenes (since someone already posted Buster taking Jetfire down hard).
I'm guessing Ratchet also tricked Megatron as well and that's how the Autobots got free when Shockwave creates Devestator.