Here's why:
* Shiny Legendary Dogs: These are usually event-exclusive Pokemon that were available in the past. You can't obtain them through normal gameplay anymore.
* Special Event Zorua and Zoroark: These were also event-exclusive Pokemon. The only way to get them was to participate in specific events that have since ended.
Therefore, owning Shiny Legendary Dogs doesn't grant you access to the special event Zorua and Zoroark.
If you're looking for Zorua and Zoroark, your best bet is to:
* Trade: Find someone who has them and is willing to trade. Be aware that these Pokemon are rare, so it might be difficult to find someone who has them.
* Wait for a future event: There's always a chance that Nintendo could re-release these Pokemon in a future event. Keep an eye out for announcements and updates.
Remember, the information provided is based on current knowledge. Nintendo can always change things in the future, so stay tuned for any new announcements regarding these Pokemon.