Try asking the following in their shops.lf shiny modest gooey goodra shiny modest lugia shiny modest togekiss
can offer shiny ev pkmn and event pkmn
Shiny Modest Gooey Goodra -> lockiegengar12, SirFear!
Shiny Modest Togekiss -> Mkushrom
Shiny Modest Lugia - N/A (Ones I could find were either shiny timid (Buckert) or non-shiny modest (DaemonWhite))
Hope this helps!