Something like Paraflinch Togekiss probably. It's usually considered legit though.
In general, the following techniques are really frowned upon:
- Using Evasion moves - Using OHKO moves (Horn Drill, Guillotine, Fissure, Sheer Cold, etc) - Putting more than 1 pokemon on the opponent's team to sleep - Using obvious "uber" pokemon like Xerneas, Yvetal, Zygarde, Mewtwo, etc on random Wifi.
http://terosclassicgaming.blogspot.com/ - Watch me beat "NES Rampart" http://www.backloggery.com/tero - My backloggery