[EricH]

Originally Posted by IndySam

Yes an alliance can have up to three.

If a team doesn't use one that spot can be filled by one from another team but they can only use the same 4 commands as the other coach on their team.

Or, if one Robocoach isn't being used, another alliance member can "borrow" them. (I also seem to remember a Q&A about one Robocoach being allowed to signal two robots.) Again, you need to make sure the commands are the same for each.