They have personal limit breaks. They're called Flare, Holy, Deathflare, Dragonfire Dive, Trick Attack, Holmgang,etc
Powerful abilities that can be used sparingly.

Yoshi said he would never let players get their own LB because it takes away from teamwork, also they would have to balance content around thrm such that the end result would be where we are now, it would just be "another" mechanic to account for and would have to be taken into consideration for add phases, dps checks, etc. Current content doesn't balance for limit breaks because they're bonuses for fine play style. To give personal limit breaks would mean rebalancing everything around them. No thanks.