The Naboo Space Chaser is found in Naboo's space region. You'll need to locate the ship using the star-like icon on the map, then chase and shoot it down in order to complete the Challenge.
This Kyber Brick is found in the Gungan City, but requires a Villain class character. Just a tad West of the Gungan City’s Southern entrance are some Lego objects clustered around a shiny silver ...