cynthia is the sinnoh champion. the champions are in the 'battle trainers' section and between the gym leaders/elite fours and the teams (magma/aqua/rocket)
she has a very varied team. her team is
spiritomb = lvl 61 (ghost/dark) roserade = lvl 60 (grass/poison) gastrodon = lvl 60 (ground/water) lucario = lvl 63 (fighting/steel) milotic = lvl 63 (water) garchomp = lvl 66 (dragon/ground)
as you can see these are very varied.
i would recommend a water type, a grass type and/or a poison type. i wouldnt try her unless all your pokemon in your team are over lvl 55 because her pokemon do pak a bit of a punch.
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