>>371296132/3
Easy and Normal modes movesets are good.
Challenge is quite bad and seems actually easier than the Normal mode.
I'd make Magmar Special-oriented with Psychic, Fire Blast and Focus Blast.
Remove Smart Strike from Rapidash, and give it Drill Run/High Horsepower so it can deal with Rock and Fire types. Swap Charm for Morning Sun, to make up for the damage loss from Wild Charge.
I'd also remove Poison Jab for Megahorn or Bounce, they're not that useful but I liked that you tried to highlight the diversity in movepool for each pokemon.
Finally, Arcanine. Take the Normal mode set, add Close Combat instead of Thunder Fang.