Potential idea for the "99% obesity victory screen", maybe Dizzy's would completely take over the town or area you've maxed out and slowly transform it into a make shift above ground lab like setting with testing chambers and tents being set up around the town. The more towns you max out, the more extreme things get until the whole world is practically a massive testing and feeding ground.
Citizens would slowly begin to outgrow their homes and the town would soon be nothing more than a bunch of blobs all around. Any girls you've met but haven't progressed enough to be sent a facility or move away would also be tested and fed into blobs like the rest of the town.
Could maybe even have different paths depending on whether you're for or against Dizzy's