He only says one thing! Meow. That's it. It's just the noise cats make. It doesn't have a specific meaning - or if it does, it means pay attention to me. And I do pay attention. He's a perfectly healthy cat.

[ Aside from the lab accident that have him powers, but he wasn't Robbie's cat at that point. ]

Uh, yeah? Toilet paper isn't meant to be unrolled. It doesn't store so hot like that, and - look how would you react if I completely unspooled every spool of cable and wire on the station? Cause it's like that.

[ That's a robot friendly analogy, he thinks. ]