Making them holograms that just LOOK like giant pokemon is so fucking stupid. What's even the point? Pokemon canonically can shrink naturally so making Eternatus' gimmick that it makes pokemon grow instead wouldn't have been that weird, but no, they just create holograms that interact with the world exactly as if they were giant pokemon, so to all effects they are giant pokemon... except they aren't supposed to be.
So fucking dumb. If they wanted holograms they should have made dynamax battles energy-mecha battles, not kaiju battles