What are the best tricks to catch a fleeing/roaming legendary?

I feel like an overall catching guide will be useful for the site. Please explain all tricks and tidbits in the book within your answer, such as status, status effects, false swipe, different Pokeballs, ways to prevent fleeing, ways to improve catching odds, etc, overall and per each roaming and fleeing legendary.

Pleaselog inorregisterto add a comment.

I’ll answer for gen 3 and gen 4 because those are the games I played.

You’ll want a fast false swiper and a fast Pokemon with both a trapping move (block, mean look, or spider web) and a sleep move, and lots of healing items (including but not limited to leftovers), Leppa berries, and timer balls. You can find Pokemon that learn certain move combinations in certain generations by using the /ds3 or /ds4 command onPokemon Showdown!.Save your gameeach time the roaming Pokemon appears in your location. Put the false swiper first in your party, keep encountering the Pokemon and using powerful attacks until it faints, soft reset, and use false swipe to bring it down to 1 HP. Next time you encounter the Pokemon, trap it and put it to sleep every time it wakes up. Timer balls achieve their maximum catch rate after 30 turns, so keeping the Pokemon asleep before you start using timer balls will decrease the chance of running out of PP.