A_CheckBuddy

A_CheckBuddy is an action that checks if the actor's "buddy" Object has at least one health point left – Var1 determines whether the "buddy" Object is the actor's target (0) or the actor's tracer (1). If the chosen Object does not have any health left, or does not exist, the actor is removed from the map. In SRB2, this action is used by the Pointy's spikeballs to make sure they disappear when the Pointy itself (their target) is destroyed.