Once per Match: If your opponent would look at your hand, or force you to reveal any cards from your hand, they do not.
Compendium / Rulings
VS Chugganomics: Botch Chug – Botch Chug will not be able to be stopped by The Code of Lucha Libre because this entrance only works once. Botch Chug will keep revealing the hand.
VS The 718 – When against a card like The 718, you do not reveal any cards, and thus do not need to bury any cards. The only effect that player will receive is the +3 to their turn roll.
How are cards like the Press Skam line affected? Despite not getting to look at hand, you have to prove you are burying all cards of a type which would suggest revealing anyway…
This is likely a good question to post up on the discussion group, but my knee jerk reaction would be that 718 cannot prove a certain type of card is in hand, so you will only get the +3 effect. (Edit: Ruling made above)