I think I might've missed something, because aside from the ending credits I haven't seen Sludge's dino mode used anywhere else. I remember in the trailers/teasers there was a moment where they're watching this hologram of Sludge's Dino-form walking around a bit, but for the life of me I can't seem to find where that is, unless I missed something. Anyone have any better luck than I have?
It's when you're in the control room, right before the space bridge tries to suck the Dinobots in. It's the big hologram projector near where Optimus' was.
You have to use the right console though. It doesn't do it automatically. And that may explain why Sludge has a VEH data.