Spear Guys look like regular Shy Guys but have red markings on the side of their face and are seen in the color red or orange and, of course, carry around a spear.
Mario Party series
There are 3 Mario Party games where Spear Guys have made appearances
Mario Party Advance
There are 2 of them in the forest area in the Story Mode. 1 of them is an orange Spear Guy(or girl) named Hula. To get her gadget. you follow her dance moves by moving left(A),moving right(B), or spinning(↑↓← →). You will also see her in the credits at the end of the game after getting all the gadgets. You dance however you like.
The 2nd one is a red Spear Guy that you must face in a dual in order if you want to keep his duel game. You must have mustache in order to face him, which means that you have to play as Mario or Luigi.
Mario Party 7
Spear Guys appear in two way: as a throwable orb and a King of the River mode enemy. As an orb, once it is set, an opponent that lands on it will be sprung into a tree. There, the spear guy will ask them to roll a dice block which determines how many coins they give to the owner of the orb (5, 10, 20, or 30). The spear guy then spears them. As an opponent in the King of the River game, they will show as your challengers, and you must accept the mini-game they challenge you to, or quit the game. If you fail the game, they will throw the spear at your boat and damage it.
Mario Party 8
Spear Guys made an appearance in the stage,DK's Treetop Jungle. When land their space, a Spear Guy and will steal on candy. If they get a piece of candy, they will give ten coins.
Super Mario World 2: Yoshi's Island/Yoshi's Island DS
They were first found in Yoshi's Island.In Yoshis Island DS, They are seen holding the spear sideways, or straight up in the air trying to hurt Yoshi, in jungle levels of Yoshis Island DS, some are seen dancing around platforms.
Spear Guys are only seen on Mt. Lavalava in Jade Jungle. In this game, Spear Guys can throw their spears at Mario causing damage. They can also point their spears upward or forward. If they point their spears upward, Mario must hammer the Spear Guy. If the Spear Guy points their spear forward, Mario must then jump on them (because if he uses the hammer, he'll run right into the spear causing damage).