How can I move monster like mario‘s monster which can walk left and right ?
One option would be to give it a bullet behavior and then change angle of motion by 180 when it collides with an obstacle.
Of course, it is just a start. Jumping and falling will need additional actions.
Thanks razor, but can you write steps of events and action
Do you have some capx where you would like me to add that? I believe it would be pointless here to create that from scratch.
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There are numerous examples of this in both the tutorials, and the 'How Do I FAQ' sections. There are even specific examples for mario.
In the 'How Do I' FAQ, search for 'enemy' and you'll find lots of useful stuff of enemy patrolling behavior.