I am scared of Hydriegon so I want my Relunclius to set up trick room and have my Emboar come out to outspeed (outslow) the Hydrriegon on both Iris and Ghetsis's teams. Please help.
TM92 (Trick Room) can be found in the Abundant Shrine. You need Surf and Waterfall to get into it, and the HM requires Surf. You get Waterfall just before the League, so it can't come in time for Ghetsis, but it barely makes it against Iris.
Hope I helped!