Anti Guy

Anti Guys are Black Shy Guys that appear in Paper Mario. They are also known as Deadly Guys by in-game characters due to the fact that their attacks are extremely powerful. They are the strongest enemies that Mario battles, excluding some bosses. In the game, Mario first encountered an Anti Guy in Shy Guy's Toy Box. This Shy Guy is guarding a treasure chest holding a Power Plus Badge. If spoken too, he will demand Mario back's off. But you can get him too battle you and get the badge by beating him. Later, in Bowser's Castle, the second of 3 Guard Door's give Mario a "best 3 of 5" quiz. If passed, Mario can pass. However, if failed, Mario has too face 3 Anti Guy's.

Lemon Candy is quite possibly an Anti Guy's favorite treat. Instead of fighting the Anti Guy in Shy Guy's Toy Box, Mario can instead bribe the Shy Guy to leave by giving him a Lemon Candy, allowing Mario access to the Power Plus Badge. However if Mario does this, he cannot fight the Anti Guy to earn the large number of Star Points awarded upon his defeat in battle.

Black Shy Guys from Yoshi's Story look very similar to Anti Guys and are closely related, given that both enemies are powerful types of Shy Guys working for the Koopa Troop. The only difference is that these Shy Guys are fighters, whereas the ones from Yoshi's Story are fliers.

The mask of the Anti Guy is gray, unlike other Shy Guys whose are white. This is the biggest change to the mask of all Shy Guys.

Trivia

 * The third Guard Door claims that he has better defense than the other Guard Door's; this mean's he believes that the Koopa Bros. are better fighters than 3 Anti-Guy's. But then again, this is unconfirmable because you'll end up facing Jr. Troopa instead.