some really interesting ideas being played with here
first thing I want to talk about is the 'boost creature'. well, we need to consider that we only call it the boost creature because we don't have any other name for it. it is the parasitic organism that makes up the core of the boost armour but this does not necessarily mean it is a literal 'booster', but rather the creature used for the boost system. from what we have seen, the main characteristic of the parasite is the ability to decode and use the DNA of the host creature. we can see how this would be useful for a booster system. it is almost like a genetic cut and paste system all ready to be used by the control metal. as was written in the VDF, it is an instant body remodelling system.
further from this, I can address another thing that has been said. that is the way zoanoids differ from the guyver system. in a zoanoid, the data for the transformation and the final zoanoid form is present in the cells of the body. aptom is designed to take this cell and the data within it and to place it within his own library of genetic data. the problem with the guyver system is that the weapon data is not stored in the hosts cells. shou cannot use guyvers weapons unless he is bio-boosted. it stands to reason that the control metal is responsible for all weapon and system data. without that data, the resultant form devolves into an ugly monstrous form that we have already seen in volume 2 of the manga. this is further evidence the weapons data of guyver is not within the cells of guyver or the host.
it isn't conclusive though. the data may still be there and we simply did not witness the creature using said abilities.
lastly, I wanted to talk about the zoacrystal and aptoms potential energy sources. we have to this date seen many zoanoid forms that appear to feature some kind of srystal structure with no obvious reason for it, no apparent use for it etc. for example, enzyme II and III have a crystal right on their forehead. what is this for? well since the zoacrystal has been said to be used for energy storage like a battery, then why not use other kinds of crystal batteries for other zoanoids?
well we have seen aptom in action and it is clear that he has massive reserves of energy anyway. he could have many energy storage methods including many biologically generated crystals that could be on par with a protozoalords crystal in terms of energy storage. but of course he has not displayed any mind control abilities so there must be a specific configuration for that ability within a crystal. who knows?
oh! I said lastly but i forgot to mention something else that i was thinking of positing. both the 'boost' parasite and aptoms cells are able to invade cells and analyse DNA. the question is, which is stronger? would aptoms cells win against the parasite or would the parasite cells win against aptom?
what if aptom tried to absorb some parasite cells and the parasite ended up taking over him completely? that would be one dangerous, out of control mofo.