Before this card was unified under this name, there were professor cards with different names that also shared the same effect, and, due to ruling issues, the Professor's Research cards were created to stop future issues if The Pokemon Company wanted to print professor cards
With the exception of confusion, all of these statues follow the Pokmon out of battle, and only sleep and freeze have a chance to wear off during a battle
Shadowless Base Set is an early 1999 Wizards of the Coast print run, identified by the missing drop shadow along the right edge of the card art box
If the Sculler hits a removal spell, its easy to kill the Sculler instead of a Dragon, since they know theyre going to get another removal spell for the Dragon thats threatening to kill them
They can be used to heal your Pokmon, draw extra cards from your deck, or increase your Pokmon's attacks