That would have been in the twenties of the UK run. For sure.
Earlier though, in the US run. One of the my favorite one on one battles in the run.
It lead to Ratchet recovering the Dinobots, trapped in a tar pit for 4,000,000 years after their first battle with Shockwave..
Mitigation for those finished off/defeated by Shockwave in US#4/UK#8:
Sparkplug had poisoned the Decepticon fuel, making it corrosive so the Decepticons were already defeated by the Autobots/corrosion.
The 5 Autobots who fought (The rest were deactivated having sacrificed their energy/fuel to superpower the 5 that fought), were largely spent.
Prime had even lost an arm to Megatron's fusion cannon.....Mirage had lost his to Ravage. Then getting a massive cave-in on top of all parties caused by Shockwave was the final straw ensuring an easy-as-possible win for Shockwave.
Not saying Shockwave was a pussy, (He was definitely a bad motherfu*ker) but had all those TFs been at full strength, and the Autobots all there, it may have been different for Shockwave maybe...
I loved it and that whole arc so much.
The characters and writing were so strong....