Ψ Doctor's Lab - Nightmare Lab Ψ
Looks like Dr. Finkelstein has been expecting Jack... with loads of high-tech weapons to test them on him! It turns out his brains have been switched with some disgusting green ones. Now it is up to Jack to switch them back!
Boss Battle - Dr. Finkelstein
In this battle, you will have to throw the Doctor's brains back in, while his head is open. So, let's open his head. There are two ways to do this.
If you dance well, his head will open up automatically, and it will stay open for a longer time, so it is easier to throw a brain in like this. And the other way, that you open up his head from behind by grabbing it, but in this case you will have to be pretty fast to throw a brain in, in time. Now, let's see his attack sequence.
He starts by using his four machine-gun spheres, Go behind him, and try staying there, because this way you can get more music notes by trying to open his head as well. These machine-gun spheres can be taken care of by spinning.
When they are gone, it's time to open the Doctor's head (at these parts you can try to throw half his brain back in, or just collect the notes and stay till you get to dance).
He will then attack with his four knife-machines. These go around the room once, two of them in the inner circle, two in the outer one. Spinning works against these ones too. When they are gone, open his head again.
He'll use his laser sphere to attack next. This will try to hit you twice in Easy mode, thrice in the other two, plus once if one of his brains have already been thrown back. The only thing you can do here is try to dodge these shots. After the last one open his head up again. The sequence starts over here.
Having his brains switched back, the Doc comes to his senses again, and apologizes. He and Jack find another holiday door, St. Patrick's Day's. They realize it's Christmas Eve, so the obvious question is, what could be happening to the Christmas Door? Jack tells the Doctor he needs to get through the Pumpkin Patch, but Oogie's monsters are blocking the way. The Doctor offers him to make a device that would scare those monsters away. That is when Sally appears, and brings a nice present for Jack... his Sandy Claws costume!
Item: St. Patrick's Day Door
New form: Santa Jack
♣ Chapter completed.
Tips & Hints
If you have completed the first secret chapter, the Doctor will be asleep at the start of the battle, so you'll get a chance to throw one of his brains back in even before the he starts attacking. You will have to open his head first, though.
In Nightmare mode you will need to throw one of the brains in without dancing in order to get an S time rank. Dances simply take too long.
Since Santa Jack's presents are the best way to get good  ranks, no more hints for you there! Whenever you need some , just keep using the  ,  , , , , , etc. technique for a couple of seconds. 
Dance Sequence
   
 
S Rank Requirements
| |
Easy |
Normal |
Nightmare |
|
Time: |
5:00 |
5:00 |
3:00 |
Combo: |
43 |
54 |
54 |
Damage: |
4 |
4 |
8 |
-count: |
43 |
54 |
54 |
|
