I think it would be best for me to have all 5 superheroes gathered together in one sitting.

Left to right:
Superheroes:
Krypto the Superdog
Kevin the Fox
Rail Spike (Power Colt)
Rocky the Mountain Mutt (in full superhero atire....for now)
Tucker the Magic Mutt

Locomotives:
Pere Marquette #1225
New York Central #6018
Southern Pacific #4350

DISCLAIMER:
Krypto the Superdog is owned by Warner Bros. and DC Comics
My Little Pony Friendship is Magic is owned by Hasbro and DHX Media
Sonic the Hedgehog is owned by Sega
Rocky is an adoptable created by strayxangel → http://strayxangel.deviantart.com/
Pere Marquette Berkshires, New York Central Niagras, and a Southern Pacific MT-4 are created by K&L Trainz