folkstyle is what is wrestled in high school and college in the US. Freestyle and Greco Roman are olympic styles.
The worst cases of cauliflower ear are usually caused by headgear that slips out of place. Friction causes the skin of the ear to separate from the cartilage, the void will then fill with fluid and it becomes very painful. Then if the dumbasses don't get it drained, it will harden over time. I know a guy who had surgery to repair it after he let it harden, I don't recommend that route.