By default, when you install BubbleIQ it will look for the :key: emoji in Slack to create a new ticket. But you're free to use any emoji you'd like!
If you want to change this to another emoji, just message the BubbleIQ bot admin and click configure under Advanced Preferences:
Then, put the name of the emoji in the field labeled Custom Emoji
Click Submit, and that's it! You're done. Once this change has been made, the system will no longer accept the :key: emoji, so be sure to inform everyone.