Calisthenics vs lifting.

Boxing training should be based around bodyweight, boxing is an endurance sport. 75% of time based on aerobic training and 25% of time close to the event should be anarobic. Training should be focused on developing co-ordination and skill, co-ordination is best practiced aerobically.
Hill sprints / normal sprints and anarobic bag work after a large foundation of aerobic work will develop an excellent endurance base.
Explosive weight training such as clean and jerk could be added for weight management and power, if a person is particually weak and unable to hurt an opponent with clean shots to the chin and liver, although this more than likely will be a problem wìth technique.

 

That **** has been debunked 100 times weight lifting is good for fighters period

 

Lifting is better but you can do both

 

Which one is better, but for what? In both cases one adds to what the other lacks.

 

This. Entirely depends on what the goal is.