Yes you can but its best t use them as the support deck there was a post before about this it basically said that every knows that you will\want to play the Freaks in 1st 2 rounds in order to use the most of the poison it would be best if you linked them with a (high damage) deck in orderto get the most out of using the two decks
I guess Sakrohm or Pussycats will be a good support
still i think they're not yet ready but you can use this deck,i like it^^
Hit poison on round 1 with splata if possible,your only problem is against nightmares,but it works all the time against Uppers decks...Charlie can be used as "Uranus" if you like or to last hit your opponent
You should go back, and look into previous threads on this subject, i'm sure you will find more than enough information.
I found it the hard way what Sven is saying, Freaks do better when they're not in elo mode, guess it's easy to play, but i don't know if the best way to combine Freaks is Pussycats, this was already discussed and somesay u will get better results with hi power cards like those in Ulu Watu, i didn't try it, u just should try out different things, and see if that kind of play suits you