Quoted By:
Imagine if you could modify pokemon like the Tamers in Digimon could? Like Mega evolving, a card/stone/gem (activated at the start of a battle and NOT a held item) could trigger a modification that lasts for the duration of a battle. Examples could include:
>Diamond Teeth
All biting attacks become Rock-type
>Hover
Immunity to Ground-type attacks
>Knuckle Duster
Fighting moves do 20% more damage
>Body Spikes
Physical attacks do 10% more damage
>Venomous
Normal-type attacks are now Poison-type
>Sickle Arms
Blade attacks do 30% more damage
With a huge variety of modifications, you could essentially give pokemon a second ability that could change the outcome of a battle. And modifications could be used by many different pokemon, leading to diverse strategies and a multitude of options.