Minecraft wiki entry for Guardian, associated text: In Bedrock Edition, guardians are structure spawns, spawning on 25 pre-determined spawning spots. The x-coordinate of each spawning spot is X+2, X+13, X+29, X+45, or X+55, where X is the western edge of the monument. Similarly, the z-coordinate is Z+2, Z+13, Z+29, Z+45, or Z+55. They spawn on the northwest corner of the spawning spot block, meaning they can spawn inside of a portal and get instantly sent to the nether. If their sky access is obstructed by a solid block, the guardians spawn significantly faster. Like all structure spawns, guardians belong to the cave cap.