i think paralyis is the best status problem to give to a pokemon you are trying to snag.
poison: hurts it every turn. you may end up killing it.
bad poison: same as above, only it goes quicker...
burn: same as poison.
sleep: wakes up.
freeze: good as it lasts for a while, but it will defrost. theres also no move that will
only freeze it.
confuse: same as poison, but it only occasionly attacks itself. it also may snap out of confusion.
attract: only prevents it from attacking. its useless really.
paralyze: status problem never goes, cuts the foes speed and it sometimes wont be able to attack.
^ simple.
use the masterball on lugia. or use the masterball cheat to snag both lugia from greevil and dragonite from miror B (<-- w00t! you rock, miror B!) in masterballs...