Edit: I've been frequently updating the guide as I feel if something is need to be added. You might see something different compared to the last time you checked this guide.
-Speed builds for farming Rainbow Goblin will be added soon-
Hello everyone. After 12+ hours of farming of RBG's for 15days in a row and 304 portals, I finally got them and I have been noting down most of the goblin's locations as I wanted to share the stats, and my/our rotation to help people who has been farming/wants to farm. I will try to make this guide as brief as possible. This is the first time I'm making a guide so please pardon me if it looks not well made.
Some Information about Princess Lilian, Whimsydale and Rainbow Goblins
I would like to correct a common mistake first, Princess Lilian spawns from another unique monster pool. (Tubbers, Nightmarity, Team unicorn, Princess Stardust, etc.) You will always see Super Awesome Cake or Evil Oliver in Whimsydale. Lilian will spawn as an extra, the 2nd unique mob. She DOES NOTspawn instead of Evil Oliver or Super Awesome Cake.
The difficulty does not matter. It won't affect Princess Lilian's or RGB's spawn chance. I farmed on normal difficulty.
It took 304 portals for me, so approximately %0,3 chance of Princess Lilian spawn chance, atleast for my journey. But remember, its all RNG, It can take just a few portals for you, or more than me (hopefully won't).
As you can see, Princess Lilian looks different from the other ponies. Only 1 other mob looks excatly the same as her, Princess Stardust (I really hope that never happens to you ) which is another irrelevant extra unique might spawn from the 2nd unique mob pool.
This is how would you see a Rainbow Goblinon the minimap and while it is sitting at somewhere. %80 of the time it sits and wait to be found at somewhere, channeling the portal. Sometimes it jumps out of the portal out of no where when you get lose to its location. If you want to share it with someone not in the party, you have to keep your distance to RGB and invite others. If you get too close to it, even if you don't attack, it will start running around and you have to kill it before it escapes. Remember %85 of the time you will hear it's sqeuaking sound before you see it. All of the goblins makes the same sound, expect the blue one (don't waste time to kill it) has a deeper voice.
Rainbow Goblin(CAN't spawn via a bandit shrine) spawn chance is around %3-4 from what I have observed. But remember, it's all RNG. Upon its death, he will make a portal to Whimsydale (not Whimsyshire) where Lilian can possibly spawn. Only the people who were in the same party when RBG got killed can access to the Whimsydale. You can only find her in Whimsydale. Once you get in to Whimsydale, make sure you check every single corner. She can spawn even next to Oliver / Cake.
Only 1 Whimsydale can occur in one game. Killing more than 1 RBG's in the same game will teleport you to the same Whimsydale. So once you kill a RBG and clear Whimsydale reset the game.
IMPORTANT !!!!!Make sure everyone gets in to Whimsydale at the same time, if someone kills Princess Lilian before you get in, you won't get the wings. She can spawn right in front of the portal you enter. !!!!!
Farming for RBG's can be discouraging. Don't get demotivated if you can't find RBG for a while. I had many instances that almost 2 hours of no RBG even though we were actively farming for it as 4 people. But sometimes we found 2-3-4 times in a row. We even found 8 times in a row, but that was extreme luck. You will eventually find one, just keep farming efficiently.
If you already made up your mind, don't give up ! I knew if I gave up I would never get my wings. I've tracked and noted the goblins to keep myself motivated and share with other farmers to help them a bit. Consistent farming might get extremly boring and it is not suitable for everyone. You don't have to farm like me, take breaks whenever you feel fatigued or bored. I also took those breaks but tried to keep them to minimum.
- Lower & mute any volume EXCEPT Effects and Master Volume. Most of the time goblins makes a squeaking sound before you are able to see them. This is very important, I have found many RBG's without seeing them at first.
It is THE MOST important thing in farming RBG. You and your party should not waste a minute while hunting. Don't waste time on killing/looting mobs or any other goblin except rainbow.
-Join "Rainbow Goblin" "Rainbow Goblin Farm" and other active communities to find people for farming together. ( I have just created one, called RBG Hunting if you would like to join)
-Do not allow any leechers in your party, make sure everyone has a speed build (chicked WD, dash monk, etc.) Always try to farm as a group, the more people you have in your group the more Rgb you will find.
-The slowest member should take the shortest act, (a3 or a5), act1 for the fastest member. Your clear time of your party for the maps I will share down below should not take more than 6-7 minutes. If its taking any longer, someone is leeching, does not have a speed build or trying to explore the whole map which is a big mistake.
-After everyone finishes their acts, each member should type "Done + act". Once everyone is done, type "new game" so everyone logs out for reset. Reseting fast is another important element of efficiency.
-If you find a goblin in any map except than P.Fortress level 1 and 2, go to the next map because except those 2 the maps in your rotation will never contain a second goblin.2.The Acts & RotationSome zones has much higher chance to spawn a goblin compared to the others. You and your group should only search them. I will only mention those maps/acts.
If you are solo farming, I suggest checking the total Rainbow Goblin stats down below and making a route including only the maps that had high amount of rgb's. For example I found 49 goblins in 50 minutes only doing Act 5 rotation. The more goblin you find, the higher chance of encountering a RBG.
Sorry for my long loading screens, FPS drops and navigation errors. You can do much better than me.