Board Thread:Questions and Answers/@comment-28009890-20160319181328/@comment-4627764-20160319212529

First, placing monsters on Gold Island will not remove the originals.

Second, It's not as hard as it sounds, (you need to box 30 monsters, instead 15 for the normal Wubbox, which is only twice as much) as along as you have enough food, and a lot of patience (It took me a month to activate mine).

The only issue is the four-element monsters (they have a low chance of breeding, take a long time to incubate, and also need a bunch of food to level up).

My advice is to have every island filled with every single natural monster (so you can breed all the monsters easily), have at least one island with 5 large bakeries (for making cakes/turkeys/whatever), and a decent income of coins (at least 5,000,000 per day).