In my opinion, its possible tho. coz when encountering a shiny it shows a dialogue "[glow=white]A Wild SHINY <name> appeared![/glow]". therefor i assume if its possible to put a "SHINY" word on the dialogue(when a shiny appears but not when its not), then it should also be possible to put an exclusive confirmation dialogue after clicking RUN. ofc excluding the non-shinies.