Naw I already guessed that.
I think Sliverhawk might be a Lucario, Dragonight or a Marowak. As for Tolls it could be his Snolax since he blocks your way and you either have to beat him or catch him, but it's probably not likly since I know he didn't name Snorlax that in the Pokemon Tournament arc in GoRPM.
I'm also going to guess that Splash Woman might be Gorebys as well.