Arianas first battle in mahogany has a vileplume, while her rematch in the radio tower has a gloom. The movesets and the rest of the team all seem to make sense, so it is just switching the hideout fight to have a gloom and the radio tower to have a vileplume
https://github.com/Rangi42/polishedcrystal/blob/1d6740b04a062e2de80315c00e6ff7f89741b325/data/trainers/parties.asm#L9919
Arianas first battle in mahogany has a vileplume, while her rematch in the radio tower has a gloom. The movesets and the rest of the team all seem to make sense, so it is just switching the hideout fight to have a gloom and the radio tower to have a vileplume