User blog comment:Omega natsu2/Future Matchups!/@comment-3424593-20140414002654/@comment-7418318-20140414221224

Since he didn't have to make Zaraki believe he was drowning him to encase him in water, or make him believe in any of the stuff he subjected him to, I'd say Gremmy was just playing around with Yachiru, rather than having to make her think of the cookies.