The only good thing about this game was some of the new Pokemon in the Pokedex were cool. Getting rid of regular Gym battles which is basically what the Pokemon games have built themselves on is such a daft move on the developers part, these trials were some of the lamest gameplay I've had the displeasure of facing.
Skip this one & play a better Shin Megami Tensei Clone. (the first monster catcher game, for any youngin who doesn't get that reference)