Replying...
Intro. (you are galvatron) after the war against Unicron, of the defeat of Galvatron, that Rodimus became a prime and after Optimus prime relieved, there were still matters which to attend against the quintesssons so that optimus prime had to resort to the help of the lethal enemy of both him and Rodimus Prime who was Galvatron, this is the dreaded leader Discepticon but Optimus prime had to take the decision despite the complaints of the other autobots, so he offered the treatment to Megatron, he still cannot believe how he managed to convince him and there was Galvatron accompanying them.

g1 (au)

@Esmeralda