Alright, Team Valor... Let's dance! I'm gonna give you the slip!

Gyarados vs Raichu
The Gyarados is... Well done.
Raichu vs Onix (the fabled Destroyer of Mice)
Raichu, being a huge mouse, is destroyed. Luckily for them, healing is available.
Hitmonchan vs Farfetch'd
And here we have a display of why weapons are usually better than fists - the range.

I'm dropping the giant sea serpent by the name of Gyarados.

Team holding gym: Valor
Pokemon: Raichu, Hitmonchan