Where can you get a timer ball in Pokemon XD?

You can't get a Timer Ball in Pokémon XD: Gale of Darkness. It was introduced in Generation IV games (Diamond, Pearl, and Platinum).

However, you can get the following balls which may serve a similar purpose:

* Net Ball: Effective against Water-type Pokémon.

* Dusk Ball: Effective when catching Pokémon at night.

* Premier Ball: Has a slightly higher catch rate.

Remember, the effectiveness of each ball depends on the Pokémon's stats and your current catching level.