This one is the hardest trophy in the game in my opinion. There are some puzzles that are designed with two players in mind and doing them on your own is quite confusing. Thankfully I found a way around a few of them to make things easier but saying that, this one will still take some patience and dedication.
Below I've included a link to the first of 15 youtube videos showing you how I finished the levels solo. I also collect all crystals along the way so if you want to knock both trophies off at the same time you can. You will have to do level 11 twice though. Once to collect the crystal using King Ubb and once without collecting him.