Jumping in here to also say I'm new to figuring out mystery event / ticket injection, and I might be missing some steps. I'm running PKHeX 26.05.05, and WC3Plugin 2.6.0, (Are those version compatible?) trying to inject mystic ticket event (not the actual key item) into Leafgreen.
When I run PKHeX and open a Gen3 save, the tool shows up. When I click on Mystery Gift (WC3), an import / export box pops up and I need to select a .WC3 file. I couldn't find a .WC3 file in any of the folders, so I downloaded one from another website. I import that file and get the success message (do I need to click on the export button for anything?), but when I boot up the save and check mystery gift in the title menu, I get the error "the wireless adapter is not connected" and I don't see the pokemart delivery man. What am I missing?