The ability you need to prevent blocking and damage is protection, which prevents creatures with some specific quality (usually a color) from being able to block, damage, and basically affect the protected creature in any way
Color Variats in Jungle & Fossil
For example, you can't sacrifice a Food token to activate its own ability and also to activate Bosco, Just a Bear's ability
Poncho-wearing Pikachu cards are some of the most expensive Pokmon cards on the market, and for good reason: 1
However, since very few exist and they provide intriguing and powerful effects, a number from Mirage have retained high price points, this one included
Unfortunately, the archetype suffers from the very thing that makes it unique