What do you have to get past the blackout on route 222 in Pokemon diamond version?

You don't need to get past any blackout on Route 222 in Pokémon Diamond. There isn't a blackout on that route!

It's possible you're thinking of a different route or a different game. Could you provide me with more information about what you're trying to remember?

For example:

* What is the specific event you're trying to get past? (e.g., a blocked path, a trainer battle)

* What is the approximate location on the route?

* Are you sure it's Route 222 in Pokémon Diamond?

With more information, I can help you figure out what you need to do.