MSE-6-E629L
From Wookieepedia, the Star Wars wiki.
MSE-6-E629L was an Imperial mouse droid remotely operated by Tonin, an R2 unit. It could use a special interface installed by Tonin to assume the identity of MSE-6-P303K while that droid sabotaged Iron Fist. This subterfuge kept the SSD's central computer from noticing the absence of much of the ship's utility droid population.
