Yes, there are applications that can reduce polycount, but they can be a bit tricky to use, and there will be other issues involved with Poser characters, like the .cr2 files. Poser comes equipped with a number of low-poly figures, some of them dating back to the original Poser 1. Since you don't need a ton of morphs or options, perhaps you could base your cartoon characters on them instead. DAZ recently released a low-resolution version of Victoria. The Victoria 2 version is only $20, and as ringbearer said, the Victoria 1 version (with fewer morphs) is still free for a limited time. So run over to DAZ and grab a copy before they come to their senses. If you're creating custom characters, you're correct in assuming that you don't need all those morphs. Victoria's mesh is only 3MB, but her .cr2 is loaded with almost 20MB of morphs. You can remove morphs easily with Mason's Morph Manager 4.0 utility, available in Free Stuff.