They are almost identical to regular Piranha Plants in behavior. The only main difference is that they are immune to fireballs. They can only be defeated with a Star, Tail Spin or a Gold Fireball. They only appear in Castles and Fortresses.
Mario Party:Island Tour
In Mario Party: Island Tour, they appeared on the Bowser's Peculiar Peak. If the player lands on a space that moves them forward a number of spaces, the Bone Piranha Plant appears, chews them up, and then throws them forward.
Mario Kart 8
These Piranha Plants appear in the Bone Dry Dunes course as hazards. They attack the same as every other planted Piranha Plant in the game, snapping at nearby racers.