On non BF/SV ROB can fair Ike's aether while spinning from certain angles (not really worth it to try this unless you're confident). Getting hit with fair with a double jump is already a tricky to avoid getting gimped with another fair. Take away our double jump and you're good. ROB's most useful ability is to snap to the ledge at will from a nice distance below the stage, forcing Ike to at best aether onstage if you time it right.edit: hey san how does rob gimp ike?
Lasering aether might help set up the gimp in a practical manner.
For lulz you can invincible release and bair/fair us while aether is rising, don't think those will actually gimp though, but possible.