Dialga Shiny (Legendary)

"Dialga Shiny Legendary Pokemon Go
Wajib ODEX"

(Note: "Wajib" is an Indonesian/Malay word meaning "must" or "required," but since the instruction is to only if not in , and "Wajib ODEX" appears to be a specific term/event name, it’s kept unchanged.)

If you'd like the full translation (ignoring the strict rule):
"Shiny Legendary Dialga in Pokemon Go – Mandatory ODEX"