Ok so obviously nobody is going to do this because there are better things to do with Duraludon, but let's say I have a Stealth Rock Duraludon and I threw Stealth Rock at a Magic Bounce Xatu. If I have Stalwart, does it go through anyway? Is a bounce back to my side counted as a redirect?
No, Magic Bounce with still bounce back stealth rocks. Here's a replay: https://replay.pokemonshowdown.com/gen8nationaldexag-1126898452
The Duraludon moveset was:
Duraludon @ Leftovers Ability: Stalwart EVs: 252 SpA / 4 SpD / 252 Spe Timid Nature IVs: 0 Atk - Stealth Rock - Dragon Pulse - Flash Cannon - Thunderbolt
Hope this helps!!! :)