The magneton has an eviolite.
I think alder was pretty dissapointing. He was fairly tough, but his choice of pokemon was terrible. I admire him for being primarily a bug type trainer... but seriously? The only good pokemon on his team were volcarona and bouffalant.
Accelgor is fast and nothing else,
excavalier is killed by any fire move,
druddigun is... terrible,
and vaniluxe...
If I could fix his team, i would replace accelgor with scolopede, because a toxic spike lead would be brutal in-game,
I would replace his excavalier with durant, cause it is fast, and powerful,
His druddigun would be replaced with Hydrigen, because the champion almost always uses the psuto-legend, plus as proven by gensies, it is godly powerful,
And vanilluxe... I would replace with chandelure, because his team has a terrible fighting and fire weakness.
Oh, and did i mention his BW2 team is on par with ALL post game trainers?