Professor's Research has been a deck staple since its introduction in the Sword & Shield base set and professors have probably seen this card be played thousands of times, meaning it's more than iconic to them and players alike
More I actually stumbled upon this place on my way to another card shop
Seadra W - Call for Backup Search your deck for up to 3 Pokemon, reveal them, and put them into your hand
The most obvious way to tell is if your card is shadowless is if the bottom of the card says 1995, 96, 98, 99 Nintendo Creatures If the card has the year 99 at the bottom, then it is shadowless
This helps summon huge creatures such as Burning Sun's Avatar, Verdant Sun's Avatar, Raging Swordtooth, and several other large dinosaurs