You add your Secondary Attribute modifier on Acrobatics checks. While using this style, you take no penalty on melee attack rolls or to AC while prone. Furthermore, you can crawl and stand up from lying prone without provoking attacks of opportunity, and you can stand up as a swift action if you spend 1 TP and succeed on a DC 20 Acrobatics check.
While using Monkey Style, you add your Secondary Attribute modifier on Athletics checks. You can also can climb and crawl at half your speed; you can take a 5-foot step by jumping, crawling, or climbing; and you retain your Dexterity bonus to AC while climbing. Further, while using Monkey Style, when you hit an opponent twice or more on your turn, you can spend a swift action to take a 5-foot step even if you have moved this round.
While using Monkey Style, if you successfully strike an opponent with a melee attack, you can spend a free action to enter a square adjacent to you that is within your opponent’s space. This movement does not provoke attacks of opportunity. While you are in your opponent’s space, you gain a +4 dodge bonus to AC and a +4 bonus on melee attack rolls against that opponent. If otherwise unhindered, the opponent can move away from you, but if he does it provokes Attacks of Opportunity as normal.