revondage: post a new topic in the forum.
This very topic is not supposed to handle questions
<center><font size="6"><font color=red>Any question in this topic will purely be deleted.
This is the only warning.</font></font></center>
As you can see in the first post.
So far, I haven't deleted any question, because most are legitimate.
Also concerning your issue, there are already items listed that allow you to swap between different sprites which have different behaviors.
In the "platformer" section, look how it is done to swap from platformer to physic behavior.
Once you understand how it is done, you can basicly achieve the same thing with any sprite and any behavior.
The list is there for you to consult, please do so.