Morphing during an animation (from one character to another)

I have a series of characters that I wish to animate, as in starting with Character A and working my way through to Character Z. (It's less than 26, but I hope the idea comes across properly.) The thing is, some of them were done with G3F, and the rest with G2F. (Majority are G2F.) I could go in and manually deal with the G2F changes (set a keyframe in the animation and manually change everything to be the next in line), but I'm wondering if there's a way to use the already saved characters as the next in line.
Let's say it's five: Abby, Bobbie, Charlene, Donna, and Eden. Donna is G3F, and the others are all G2F. If I have all the settings for the G2F girls written down, I can manually alter Abby to Bobbie, and then Bobbie to Charlene. Is it possible to load a preset character IN PLACE OF the existing character, or do I need to do that manual change? If so, how do I go about doing the replacement so that I don't lose the keyframes? (If it's not possible to load in Bobbie in place of Abby without losing the preset keyframes, then I certainly can't replace a G2F with G3F in mid-animation, which is kinda necessary for what I want to do, and is pretty well past my current skill level to stitch together in post.)
Comments
Let me start by saying that I don't usually work with animations, so there may be others who might chime in with better approaches. Anyway, if I were wanting to do something similar, I would tend to use morph sliders to transition gradually from one character to another through a series of frames. That, of course, would assume that the desired characters all actually were set up with morph sliders. I would start out with Abby at 100%, then go to the next frame and set Abby to 80% and Bobbie to 20%, then proceed to the next frame and set Abby to 60% and Bobbie to 40%, and so forth until Abby was gone and I had Bobbie at 100%. I would then use the same procedure to change from Bobbie to Charlene, from Charlene to Donna, and finally from Donna to Eden. If that did not result in a sufficiently smooth transition, then I could modify the changing percentages to 10% increases/decreases instead, with a corresponding increase in the number of frames to complete each transition. Now, that would work if the morphs alone were the only changes, but transitioning to different textures if desired would be more problematic. I'm not certain how you could smoothly perform such a transition without a lot of manual fiddling.
I don't think you can use different base figures for this project easely. You would have to transfer your G3F morphs to G2F so that you can use only one base figure. And I don't know how to do that.
But if you use only G2F characters it's pretty simple. Save every character as a shaping preset, start with character A at frame 0, go to the frame you want to have character B, zero figure shape
and apply the shaping preset for character B, repeat...
Maybe someone else can help you with the process of transferring G3F morphs to G2F.