My friend SamuRH made a cute intro for the projects that use pret with the RHH Battle engines, featuring an Egg (as DizzyEgg original creator) and a shiny Porygon (RHH mascot, maintainers of the current branches).
All credits go to SamuRH/Xhizy, I'm just sharing the resource!
Github branch: https://github.com/Xhyzi/pokeemerald/tree/rhh-intro-credits
Gif: (custom title screen and title not included)