Stalling Bedtime with Poop!

Ok so at this point he is pooping in the potty and the pull ups at night are just so he won't wet the bed? I'd have a chat with him and let him know that the pull ups are just in case he's sleeping and pees. Poop belongs in the potty only. As part of your bedtime routine ask him if he has to poop because poop doesn't belong in his pull ups. If he pops out of bed telling you he pooped just tell him that you'll take care of it in the morning (but of course once he goes to sleep go check).

Have you tried talking to him right before bed? And putting him on the toilet last thing?
This is what I would try:
Ok, Timmy, since you have been pooping right after you go to bed lately, we are going to the potty the LAST THING before bed. That means, after story, etc you will sit on the potty one last time before bed. And then, after that, you won't have anything left to go in your pull-up. If you do, since it will be so small, you should be able to clean it up on your own. If the pull-up needs changing after you've to bed, then you will have to change it and clean up on your own.

Then, after the entire bedtime routine, have him go sit on the potty. Stay with him and make sure he really does try to go. Encourage him to try, "because he needs to get it out now, not after he gets in bed, because if he does it after bed he'll have to clean it up on his own."

Then, if he has success, praise praise praise, and tell him that's great. Put him to bed. The end. If he goes in his pull-up follow through. Just tell him you're sorry, when he is done cleaning it up, to wash his hands and get back in bed. Don't go help. (After he eventually goes to sleep, you can go check the bathroom to clean up any mess that was left not properly cleaned).

It won't hurt him to do this. And may solve your problem the first night---when he realizes that you MEAN it. At 3, she should be able to manage his bowel movements enough to hold it overnight. Urination is another "animal" altogether for some kids... but the bm's he shouldn't be having "accidents" at night. You said yourself, he is doing it intentionally.
Good luck.
Then

Let him stay in it. He WILL live through it. He WILL learn it is not a control tool anymore.

I would just change him in a no nonsense fashion and put him back to bed. As long as he isn't getting too much attention out of it, he'll probably stop doing it. My daughter did this too and luckily it was a short lived phase.

Good luck!

K.

Throw all the pull ups away, they are obviously a crutch. Leave a training potty in his room by his bed. If he poops in bed, change the sheets and put him back down (keep sheets down to a minimum, rubber mattress cover, towel, one sheet, some smaller blankets for on top of that). If he is put down for bedtime, don't reward his behavior with talking, keep quiet and ignore him. If you are training him to use the potty in the day, but giving him pull ups at night then he's going to learn to hold it all day until you give him a pull up. At some point he's going to have to learn to stay dry at night. 3 years old is PLENTY old enough to do this!

Hang in there, you'll be glad you trained him!

Make bedtime earlier. Tell him it's because he's pooping instead of going to sleep.