Alister recovered from his physical injuries just one day after the incident, of course, that was because he actually didn't had any physical injury, just the punch that Alfonso throw at him, giving the fact that he was a champion and his overall physical constitution was greater than normal humans, it wasn't a surprise that he recovered in a day…
His physical injuries, that's it…
After a week of staying in Wasteland Valley, Sebastian notice that something was wrong with Alister, the character of Alister was the typical pampered young master that thought that everyone and everything was at his hand, that the world spin because of him, of course, his identity as a champion who like ring to the finger with that attitude.