How to get them:

Do what you have to do to get a P Rank

How to get a P Rank:

1. Never lose your combo once it's started, if the combo ends, P rank is locked, you need to carry it from the first enemy you kill all the way to the end exit
2. You need to collect every primary collectables, this means :
All 5 Pancake Toppins
All Secrets in The Level
The Secret Treasure
3. You need to clear the second lap

Z Rank Stuff:

1. Do a Lap 3 or More

2. Keep your health throughout the entire level or have full health at 100 when your get to the exit (only if your not on lap INFINITY

3. Activate Ash’s Challenge

4. And Have the Cheese Meter Full