Talk:Spike/Abilities and Powers/@comment-25275065-20151222234755/@comment-4080028-20151224043239

That would be difficult, to be honest. I'm still working out how to rewrite Spike's usage of Haki and how he came to learn to use it over time; but more impotantly, Spike ends up splitting off with the crew's doctor during the time skip in order to train and grow stronger. Together, Spike and Aphro stay on Drum Island for two years; with Spike growing stronger by constantly sparring with the Lapahns. During those two years, he improves more on his Zoan transformation powers, gains the Revival Cube that was made by Aphro, and thanks to the medical knowledge of Drum Island, he comes to begin learning how to use Life Return, so now he can alter his Zoan transformations sort of like what Lucci did in his fight with Luffy.

So long story short, if Robert were to learn Haki from Spike, he'd have to know the Jollys actively chose to split up at Sabaody Archipelago shortly around the Impel Down arc and before the war at Marineford, and that Spike sailed off to stay at Drum Island for two years. Likewise, Robert wouldn't really be so much "learning" how to use his Haki from Spike as he would be training to use it alongside Spike, or at the very least, he'd be learning the basics while Spike masters control of his Haki. It really all comes down to what I decide to do with Spike's Haki if I get the chance to think it through and write it down here, as it's the only aspect of his powers and abilities I haven't finished yet.