Olivia is the Rock type Elite 4 member in the games Sun, Moon, Ultra Sun & Ultra Moon. Where Olivia's team in Sun & Moon consists of Relicanth, Carbink, Alolan Golem, Probopass & Lycanroc-Midnight, which has Rockium Z. So for her Sun & Moon team, you could easily get by with a Ground type, but with the Relicanth, use a Grass type instead. Meanwhile, Olivia's Ultra Sun & Ultra Moon team is a bit better with her team being Armaldo, Cradily, Gigalith, Probopass & Lycanroc-Midnight with Rockium Z. So here, the team is a bit tougher to take down, so you can't really just heavily rely on one type, my advice for the USUM elite 4 battle against Olivia would be to use a mixture of Fighting & Water, since Water type would be best bet against Armaldo. Steel could also work, just would want a ground or fighting type to easily take down her Probopass. Terms of design, Olivia's character design is great, just not my favorite Alolan character design, probably top 3 still though. Overall, I was planning on taking someone else out for this spot, but after looking at all the teams side by side for the members left in, I felt Olivia was the better bet to take out at this spot over the others left.
