Kuroto's transformation phrase, Ectophase Activate, makes sense considering that, due to Compressed Adaptation, his first on-screen transforming is actually when he first uses Dangerous Zombie. The word "ecto" is usually associated with the paranormal term ectoplasm, a kind of spiritual energy that enables a medium to communicate with the dead. Dangerous Zombie is, obviously, a zombie game and as such, by activating the "ectophase", he is activating his ability to tap into his inner zombie.
It also ties into similarities he has with Enter, the villain of Go-Busters.
Nico's transformation phrase is a two-fold reference. First, it's a reference to Suite Pretty Cure ♪, but it's also a reference to Let's Plays, which makes sense considering she's a professional gamer.
Whether intentional or not, the degree to which the abridged series compresses the story into each episode helps it match the breakneck pace of the plot in the original series.
As detailed under the I Am A Humanitarian portion of the main page, Emu and Poppy don't seem to have much objection to the idea of eating people. Suddenly, Emu's habit of locking people in his basement and Poppy's hobby of torturing Emu's basement prisoners have become a lot darker
Kuroto says that for Dangerous Zombie to work (in this show, at least), one has to be very toxic. Salty players can also get pretty toxic and Emu states that he's always salty. In other words, in this universe Emu can use Dangerous Zombie.