Board Thread:Questions and Answers/@comment-5574091-20140323162249/@comment-4349788-20140518022638

To sum it up for those who didn't catch that.

Ben 23 is about as young as Ben was in the original series.

Swampfire's new look is due to Swampfire Puberty.

Ben 23 isn't old enough to go through puberty, Thus the old design.