I want to 2nd this being a good question. First, I've seen that once immunity is removed, scaling ninjas can catch certain debuff effects like every else.

For example, using fireman immobile + imprison on kushina opens her up to dream status, where she can sleep for two rounds. C*so happen to 6pths. What I haven't been able to confirm is if she c*so be enfeebled in this imprisoned/immobile/nonimmunity state.