You'd have several mons dedicated solely to bondage. One that likes to tie its foes up in shibari, one that can seal foes in vacbeds, one that's all about the no-nonsense bondage and just ties your arms and legs down so you can't move... maybe one specializing in ballgags to counter sound moves?
Then you'd have the gimp that evolves into a masochist if its Def is higher than its Atk, or a sadist with Fire Lash if its Atk is higher than its Def.
And then you'd probably have a mon with a mouth where its butt should be for the anal vore.