Faker would make a perfect Lusamine due to being connected to high power and being overall bad parent who gets a redemption also working With the ultra wormaholes makes sense for his arc
Hart makes a good Lillie he's nice like her wouldn't seem like the type to like seeing injured Pokemon and grows as time goes on through getting help with the protag overall Lillie fits with his personality more than Gladion would.
Kite makes a good Gladion because they are very identical personality wise and want to protect what's most important to them.
Yuma as Hau because they seem very similar and like food a lot
Mr. Heartland would be definitely Faba