1. Request him to go to sleep.
2. If Mona orders you to sleep, do not go to sleep, let him sleep.
3. Pet him.
4.try to say "meow" to him many times.
5.bring meow wow plush, oh-, maybe chirithy plush would be worth it.
6.bring another cat and a dog to your house.
7.mistake always as "her" not "him".
8. Bring him to the bath ( because cat hates to water).
9.if any of these didn't work, you are forced to sleep, its no use...

Wait, you said 999?
Then bring your own ways to trigger Mona too