I'm never sure what to do when Terraria updates, make a new world or continue on my old one where I already have my potion/mushroom farms/proper storage. I really want to make some of the things that the Goblin Tinkerer offers, but I'm not sure whether or not he can be found on a world generated before version 1.1.
If I'm on a world that was generated before version 1.1 and a Goblin Invasion occurs, will I be able to find the Goblin Tinkerer somewhere in my underground, or will this only work on post-1.1 worlds?