Looking them over now, I'm really impressed at how varied Lucas's and Dawn's teams in BDSP are. I would have expected them to have identical teams, but they super don't.
In his first battle, Lucas uses Mothim, Gallade, Clefable, Tangrowth, Magmortar, and Milotic, with one of the latter three swapped out for a starter. Meanwhile, Dawn uses Wormadam, Froslass, Clefable, Tangrowth, Magmortar, and Milotic. Once again, one of the latter three are swapped out for a starter, and additionally Wormadam's cloak depends on your starter
(though there doesn't seem to be a pattern determining which cloak goes with which starter). Not only are the parallels between Mothim/Wormadam and Gallade/Froslass cool, but even among the Pokemon they share, only Clefable and Magmortar use the same set.
Their teams get wild in their second battles, with every single Pokemon depending on your starter. These rosters are so complex that I'm gonna need to use pictures to make it barely readable.
Dawn has a Flying-type



, a Normal-type



, a sort-of wild card


(so close to just being Ice-types; was Galarian Mr. Mime originally supposed to be in this game?), and finally makes a FWG core between a random mon



, a past starter



, and a Sinnoh starter



.
And then Lucas... oh my god. He also has a Normal-type



, a wild card



, and a Sinnoh starter



, and then fills the rest of his team with a fossil



:, an Eeveelution



, and a Rotom form



. But what blows my mind is how Lucas incorporates a FWG core into his team. Two of the pieces are always the starter and the Rotom, and usually the last piece is the fossil, but because there's no Fire-type fossil, Flareon takes the Fire slot on that particular team. Starter-dependent teams are rare, and I can't think of any other that plays around with so many rotating slots, not to mention overlapping and intersecting different trios
(fossils, eeveelutions, fwg).
My only annoyance is that none of them ever use Alakazam. They kept the Clefable from their multi-battle team, but not the Alakazam. Actually no, I do have one other annoyance: Dawn sometimes reusing the Froslass. Every other mon besides the starter is always different between the first and second battles.