>>26952071I should preface this by saying that any trainer, regardless of how serious they are, should *always* have a plentiful supply of potions and other medication for their Pokemon. A lot of trainers forget how much of a physical strain it can put on their Pokemon, and while I don't have any problems with Pokemon battling, I can't stress how important it is to keep the well being of your Pokemon at the forefront of your mind at all times. You should never put your Pokemon through more discomfort than necessary, and once a battle's over, a potion and a chance to rest is exactly what your Pokemon needs to keep them fit and healthy.
But honestly? Rushing in to administer a potion while a battle's still going is probably one of the most irresponsible things you can do. Remember that a potion helps accelerate healing, but a broken bone isn't going to heal itself in a few moments even with a potion. Your Pokemon might look like its still able to fight, but I can guarantee you that the only two things keeping it standing are adrenaline and painkillers. You're pushing a heavily injured Pokemon to fight harder and harder, I can't tell you how many times I've had to deal with trainers who've pushed their Pokemon so hard and are surprised to find there are consequences for it.
All I can really suggest for to-be trainers is just be considerate. Pokemon are living things, not machines, and you should treat them as such.
A full restore is a different matter. There's a reason Gym Leaders and the Elite Four use them over potions, since they do actually have incredible restorative properties far beyond anything a standard potion can achieve.. Remember we're also talking about experienced professionals here, and I would trust them to be responsible with their Pokemon and know their limits and the limits of their team.