Pikachu would teach Raiden a lesson or two on how to use lightning properly in Mortal Kombat. And you probably wouldn't have to worry about Snorlax or Bulbasaur.
In this stellar animation, Adrian Jensen shows us what Pokémon would do if they were playable characters in Mortal Kombat.
Reminds me of Primal Rage:
Pokemon Mortal Kombat Fatalities [YouTube]