Does any one know how too help me catch the legendary birds/ cressila in pokemon platinum all i have is zaptos i lowered all their hps but yet i still can't catch them i have a wobbefft that has the abilitie shadow tag (doesnt allow pokemon to flee) yet I still can't catch any legendary pokemon!! HELP!!
Well I'm not sure if you have noticed but every time you hurt one of the roaming Pokemon that damage stays, (Unless you KO it). So what you have to do is get Pokemon faster then the roaming Pokemon to first Paralyzed the Pokemon using Thunder-Wave or Stun Spore. After that you need to lower it's HP as much as you can (Without KO it) False Swipe* is probably the best move you can use when the roaming Pokemon is near low HP. (False Swipe always leaves the defending Pokemon with 1HP)
Get a Pokemon** with good Speed and high Attack with False Swipe to keep lowing the roaming Pokemon's HP. Once the roaming Pokemon is at 1 HP and is now Paralyzed use your Wobbuffet as a Shield and keep throwing Ultraballs at the Pokemon till you catch it.
*You can get TM54 False Swipe at Veilstone Dept Store on Floor 3 for 2,000Pokedollars.
**Garchomp would be the quickest and strongest choice, but any Pokemon can be good if it's high enough level.