Hi, looking for advice on a visa related visit to KUL (Indonesia Immigration made a mess and might need to leave the country to obtain a new visa (visa on arrival). So the cheapest flights are DPS-KUL return. I could even go in one day and back. Here is my question:

Is there any requirement to enter Malaysia (pass immigration) or could I just checkin online after arrival - without luggage and hop on the next flight back with Air Asia?!
Thanks (EU passport)