Choice items:
Let's just say, you have a Starmie with Choice Specs. You select Surf on the first turn. You have to use Surf for the rest of the time Starmie is in. Another situation is that you have Starmie trick the Specs onto a Ferrothorn using Leech Seed. Now Ferrothorn is stuck using Leech Seed(which ofc Starmie doesn't really mind).
For Furret, don't trick a Flame Orb, whatever you do. Flame Orb should NEVER be used to trick unless the user actually doesn't really care about the burn(Reuniclus). Burns cut half of your attack, and Furret will be doing quite shitty damage even with Facade.
If you want, you can Trick a Choice Scarf. Not many Pokemon actually like being scarf'd(Skarmory, Blissey, Ferrothorn, Reuniclus, etc.)