Last three items for collectors book question

[Crabulon]

so i believe i am missing the dog face, dog set, and bunny ears for yuri. how many titles do i need to have to get dog face? for bunny ears?

[Matex]

yuri bunny ears requires every single title in the game afaik.

[Miraglyth]

It's not strictly EVERY title. Some titles are worth more than others (and the DLC ones are all worth nothing). This means many titles are required to make the requirement, and others are not.

If you're at the end of the game and have most of them by this point, you need all of the solo Colosseum titles and Manly Man for completing the monster book. So if you're missing any of those they should be your first port of call.