Dr. Mario Challenges in NES Remix 2: Our video and guide

Having never been into Tetris, Dr. Mario or anything else of that ilk, I
personally found the six Dr. Mario challenges in
NES Remix 2 for Wii U rather
difficult – making it fortunate that there is only 6, and not 16 like the
Super Mario Bros 3 challenges.
The first few challenges are
relatively straight forward but I found challenge four and six to be a
particular PITA. This is our guide on how to get Rainbow star rank on all
of these challenges.
