Advanced Heroes are evolved Heroes, they are more powerful and looks different than other Heroes. You need to gather items and meet certain criteria to be able to evolve your Hero to Advanced status.
When your Hero reaches the rank of 1.st Lieutenant (purple 1-star) and level 50 the option to evolve into an Advanced Hero appears in the Hero Academy .
Specific items (combined from materials) and a blueprint are necessary to start the evolution process. Optional is to add a Level Scroll as addition to the previously mentioned Items to save the EXP progress you have made with the Hero.
'''Warning!''' Evolving without a Level Scroll will result in a evolved Dino Hero at level 1!