Suloku's been working on a tool for both event injection and editing. For R/S it'll handle the e-Reader stuff (American Eon Ticket, Trainers, Berries and the Regi Dolls )and Europe's Eon Ticket (in all five languages) while for FRLG and Emerald it'll handle Wonder Cards (both the officially released events and unused events like Altering Cave and Battle Trainers similar to the e-Reader ones R/S got). He said he'll release the tool once all the European events are collected from Nintendo Italy. But if you don't want to wait for the tool, you can always resort to things like cheat devices, Morfeo's hacked events or Takasan's tool if you want events for the Japanese games.