Current questions and answers regarding the map editor.

First, assign a script name to the desired creature. Make sure that the animation set contains the necessary animation (it is better to change the animation set from creature-adv to creature-arena). Then, at the desired time, play this animation using a script:

PlayObjectAnimation('your assigned script name for the object',
 'animation name', 
 the third parameter - IDLE, if you want the animation to loop,
 ONESHOT - to play it once,
 ONESHOT_STILL - to make the creature stay in the final frame of the animation)