They appear as common enemies in jungle levels in Super Mario World 2.
They attack just like before, but they only appear in the level Shy Guys' Village.
Spear Guys also appeared as enemies in the N64 game Paper Mario.
In Mario Power Tennis Wii, Shy Guy's special attack is turning into a Spear Guy and either stretching their racket (long range), or turning into a Spear Guy and his racket gets hit by lightning, then he hits the ball, turning it into a lightning ball. Same with Mario Slam Basketball/3 On 3.