So I'm new to pathfinder and want to bring my character from 3.5 over to my friend's campaign. I want to make a halfling wererat but I don't see a level adjustment or hit die anywhere. The entry in the bestiary says he's a cr2 but the sample creature says he has 2 levels of rogue. Am I to assume that there isn't a level adjustment for a were rat? Should I just use the monster manual 3.5 version (in which he's a level adjustment of 3 plus the 1 hd for the dire rat)
Pathfinder kind of got rid of level adjustment, and their advice is not to do it. If you really intend to do it though then the CR now equals the LA.
PRD:Challenge Rating: Same as base creature or base animal (whichever is higher) + 1.
I would give him an LA of +1. At the most +2 for the template.