With all the new characters I have seen one of the most annoying I've come across is Robin. Two moves: Arc Fire and Arc thunder (I think that is what they are called). These two moves are perfect combo for keeping people away from you and then doing big damage them with a Arc thunder.
Luckily Someone tonight annoyed me enough and I was able to beat them with R.O.B.! Does anyone else have big problems with cheap people who do stuff like this, and if so who are these characters with moves like this?