You find the remote in pieces. Before thinking about training, look for its batteries and any missing plastic or metal parts. If a battery is damaged, missing, or may have been swallowed, treat it as an emergency: contact your veterinarian or an animal poison service immediately and seek veterinary care right away. Batteries can burn tissue or cause an obstruction. Do not induce vomiting or try to retrieve an item from a dog's throat unless a professional directs you. If the dog has difficulty breathing, is drooling heavily, vomiting, or acting weak, seek emergency veterinary care.
Keep the pieces and packaging for the veterinarian, and note when you last saw the remote intact. If your dog stiffens or growls over a remaining piece, do not grab it by force. Use distance and get professional guidance while you prevent another pickup.
Keep electronics out of the dog's route
Put remotes, chargers, and batteries in closed storage rather than on a low table. Check sofa cushions and bins for loose cells. After the veterinary question is settled, offer safe chewing options appropriate for your dog and notice when the remote is targeted: boredom, distress when alone, or easy access during family TV time. Practice "leave it" with harmless objects, not an electronic device.
A replacement remote is simple. A swallowed battery is not. The order matters: account for every part first, then make the living room safer.
Sources: Pet Poison Helpline: What if my dog ate a battery?. Dogs Trust: Destructive behaviour in dogs - how to stop it.