While it can be annoying to pick up a great card and see that its no longer playable, regulation marks are still necessary in the long run as they keep the competitive circuit in Pokmon accessible, fun, and lively
Its a Mind Control effect with a nice little bonus it stops the creature attacking and blocking, but not from crewing
If all goes well, the anniversary can start heading in the right direction, and fans can look forward to Yu-Gi-Oh
The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle." Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text