Seems to interact oddly with Saffron but I believe this is because of the way Team Rocket works. The event itself works fine.
Also added the Up-Grade, as before, Porygon was evolving via Trade.
Uses text referencing LGPE, and has a similar location.
Because of the sprite limit in Saffron, the Pidgeot NPC has been removed.
* Update sign to bg_event #289
* Rename warp to warp_event
* Replace object to object_event
* Move warp macro parameter from warp x, y, id, map to warp_event x, y, map, id