Frosslass seems like a D rank pokemon. It can spinblock and set up spike, but nothing more. As the definition says, it has a small niche, but can be more trouble than it's worth. Also, I Think that scolipede and Accelgor should be added to C rank. They can threaten Ttar leads while preforming thier duties properly. The also can preform much more like Baton pass and Choice specs and have pretty good speed. Being able to outspeed Lati@s is an incredible feet. However they both lack bulk and their power may be underwhelming at times.