There *is* a bit early on in the series, when Starscream has the Star Sabre and Megatron uses Leader-1 to dick around with him and make Starscream attack Demolisher ... I seem to recall Megatron has a line where he turns to Demolisher and says "I was only trying to save *you*" or somesuch. That's all I can think of, other than Demolisher not getting his face punched in for interrupting Megatron when he's beating the living daylights out of Starscream a few episodes later.

Demolisher has a lovely, subtle character arc that starts up early in Armada and resolves half-way through Energon/Superlink, and it's all about how he relates to Megatron and how he feels about being a Decepticon. T'is good.