Proper sizing matters because loose sleeves allow cards to shift during transport while tight sleeves may damage corners over time
I weighed a few standard size Pokmon TCG cards of different types and rarities from the Crown Zenith set, and (based on this small sample), the more desirable holo and art cards do weigh more than a normal common card
Despite this, these decks have been at the forefront of the meta for the past year, and players are becoming frustrated at their versatility
Roller Lines are an imprint, which means there was light pressure used to give the card a mark
I think it's bad taste to add a beneficial combat damage trigger to it
The most common evolved Pokmon card used for this purpose is the Dusknoir card from Night Wanderer [SV6a] as shown by, for example, the Terapagos ex/Dusknoir and Palkia VSTAR/Dusknoir decks