This is probably not possible without some addons but can I set a spawner to check an entire region and list a certain set of tile IDs that can be given a certain effect?
Can I use the #TILES command to specify different XmlSpawner entries other than spawning creatures? So for example have all tiles of ID X in region Y will teleport player to location Z?

Thanks ,

unfortunately, #TILES only controls the selection of spawn locations.
To actually have actions like teleporting triggered by moving over certain tiles would require addons.

Ok no problem I'll be able to work out some work around eventually