ITT we make our own new gimmick

>Trainer style
Its an ability that the trainer the it self has and usually its about sacrificing something to get another advantage.

Every aura its attached to an NPC class that become yours instead of the typical pkmn trainer of always.

Examples:
>Hiker: All your pokemon becomes immune to hail but take double damage from sky drop and rockslide

>Scientist: Yours electric and poison moves always lands except in foe ghost and fairy pokemon whos accuracy gets halved

>Psychic: Every time a foe pokemon enters the battle you randomly can see 1 of their moves or their held item

You get a trainer style by completing a trial held by the proper NPC, along with the style you get a corresponding piece of costumization. Examples:

>Hiker: Hiker hat, big bagpack and hiking boots

>Scientist: Reflecting white glasses and withe coat

>Psychic: Turbant, star patern robes and pointy shoes

This is not a plot central gimmick, just something optional in postgame