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>each(minus a few weaker ones) pokemon is given one or more field abilities unlocked by progression
>they function like hms with different things such as tearing, swimming, climbing, breaking, pushing
For example aggron would have all the above while alomamola would only have swimming
>these are the only roadblocks
>backtracking is encouraged to find off to the side locations with exclusive pokemon
>gym leaders only use three pokemon but force you to use three as well