923136 Plus, certain aspects of MLP suggest that ponies also have early forms of electronics.

923172
I thought it would be more interesting to go through the one universe the group created through the battles and Reference Guide. Seems more... immersive than making something up every new game.
923176
IIRC Lauren Faust said those were magic-powered.

923171 Humans. How else would they power their auto-gyros, land cruisers, and zeppelins? Unless they're solar powered, or something.

923179
We'll talk it out with Bloodpool and see what we could make.

923182
No electricity to be found.
http://www.fimfiction.net/story/77098/6/offical-unit-reference-guide/humans

Also steam power.

923200 Oh yeah, been a while since I read that.

923200 Still, wouldn't hurt give them some tanks.