You should use a "Timeball". Go in the battle, and fight 20 minutes, then you should catch without failing.
If you mean another trainers Pokemon you have to use cheat codes
You cannot catch Celebi unless you are using cheat codes or waiting for Pokemon events.
you can't normally, but you can with cheat codes for gameshark, ProActionReplay etc. (cheat devices0 you can compleat the pokedex then go to prof berc and git a one from difrint version but that's it without a game shark
You don't
You cannot catch it without cheat codes because the Marowak is a scripted special Pokemon "ghost." If you really want a Marowak, you can get one by evolving a cubone or catching one on Victory Road.
This is impossible without the use of cheat codes, unfortunately. Only the Master Ball can catch Pokemon without fail.
I don't even think in Pokemon you can use cheat codes because I have almost every game. Unless you mean Pokemon online then no
If you mean another trainers Pokemon you have to use cheat codes
you cannot catch celebi in Pokemon leafgreen. you can only get it through cheat codes or trading.
You cannot catch Celebi unless you are using cheat codes or waiting for Pokemon events.
you can't normally, but you can with cheat codes for gameshark, ProActionReplay etc. (cheat devices0 you can compleat the pokedex then go to prof berc and git a one from difrint version but that's it without a game shark
You can't. Unless you use another cheat system.
No.
Sadly, no.
You don't
You cannot catch it without cheat codes because the Marowak is a scripted special Pokemon "ghost." If you really want a Marowak, you can get one by evolving a cubone or catching one on Victory Road.
You just need to hope one randomly appears or you can catch the red Gyrados at the lake of rage