1) How does a powered exoskeleton that has rockets attatched violate the second law of thermodynamics?
"The Second Law of Thermodynamics states that the state of entropy of the entire universe, as an isolated system, will always increase over time. The second law also states that the changes in the entropy in the universe can never be negative."

2) There are [url=https://www.youtube.com/watch?v=rBNRQTFTm00]exoskeletons[/url] and robotic tanks which exist with current tech.  With another 100 years of development, it could easily become a suit of armor you could wear.


Also, from the original post:

"Humans on Earth can be affected by the residual 'influence' of characters of a particular type. For example, a DBZ character existing means that the 'possibility' of flight and qi, however slim, now exists. Of course, that possibility can grow stronger depending on the person and time, but in the end it's all up to random chance and luck."

So, if humans can learn to fly and shoot Ki blasts because a DBZ character now exists, shouldn't his tech work in this world for other people too?

Finally, this is inspired by Re:creators (which I'd never even heard of until I saw this RP), not a copy of it.  Just because it didn't work that way in the show doesn't mean that it can't work that way in this RP.