The PC engine had some weird stuff.

Used as a promotional anime attached to a PC Engine game, Private Eye Dol is about aspiring idol May Star who along with her holographic doll companion Navi, (yes, long before Ocarina of Time and yes, she is annoying) get frequently dragged into solving mysteries whether it be Scooby Doo like in a haunted mansion or more anime related stopping a hacker from exposing idols' private lives.
The anime takes the latter story but is a bit inconsistent with what the little hologram can do power wise as it pulls the power of love and friendship card and the hope that a TV stunt from the beginning of the episode can work to defeat the bad guy.
You can tell that this was rushed but it surprisingly crams alot of potential in the 45 minute run time, May Star is an endearing idol character and has a decent supporting cast to keep each story fresh, a 13 episode series would be decent even if it has nothing to do with the games plot.
Dub is non existent, in fact there is so little information I had to translate a Japanese wiki to obtain notes on the cast and synopsis just to refer to in order to write this.
Final Verdict: Has more potential than most 90s OVAs, what they produced is not terrible but is clearly rushed.