Some experiments had been performed.

Examples include the fake Gigantic which was composed of three seperate zoanoids.

Zoalord Khan can absorb other zoanoids to increase mass, he just absorbed about a million in the Manga to take on a 60 meter tall giant creature form.

Waferdanos uncompressed himself from a hairy humanoid Zoalord form into his original forest form.

But generally all zoaforms have the ability to increase mass, otherwise they would be incredibly dense in their human forms.

I theorized that the Creators tapped the same natural function of the Guyver unit to Bio-Boost to provide the energy for the mass increase.

Basically I think in the Guyver universe that during transformation the characters are channeling power from the boost dimension but the effect is only for transformation. The power of the form has to be self sustaining otherwise.

The Bio-Boosted Clone Monster that formed from G1's severed forearm in the Manga seems proof of this since it could Bio-Boost without either the CM or gravity control orb and was thus a natural function of the organism itself.

The Creators already had the unit when they came to earth so they could easily have adapted its technology to help create the zoaforms and could have been part of their dimension manipulating technology.

After all E=MC^2 and so a significant change in mass would require more energy than you can get from a typical nuclear bomb.

But only the Guyver is capable of continuously syphoning energy from the Boost Dimension. All others are limited to only tapping it for transformation.

That's pretty sick stuff. To think they could create an armor system like that and then use similar principles to genetically alter people to have a property close to but not on par to that of the guyver. So is the extra mass, comething that is genetically programmed into the person or is it pulled from some place else during hte transformation?