Pleaselog inorregisterto add a comment.
Honestly, there’s really 5 Pokemon you should use it on.
Depends on what you want to catch that is extremely hard to catch. It’s your choice but do not use it on something foolish like the three legendary dogs. That is a bad idea. I would ither go for Lugia of Ho-Oh since you play Heartgold and I play Soulsilver lol but I would recommend Lugia for hg and Ho-Oh for ss. Hope I helped. Or…..Mewtwo. That is very hard to catch but might be achievable with dusk balls but you have to do some pretty good stat changes to it.
Use it onroaming Pokemon(Entei, Raikou or Eon Duo). It guarantees capture and you don’t have to go through the hassle of getting a Pokemon with Mean Look/Block, etc. and battling it.
Either that, or use it on Mewtwo, since nobody likes a capture rate of 3.
You could either save it for a Pokemon you really want that might escape, like a shiny. Or you could use it to get a rarer Pokemon like Ho-Oh, Lugia, one of the three roaming dogs, or any of the other legendary Pokemon in the game.