I was thinking of playing another Pokémon game on an Emulator on my pc and I was looking around...
I came across Celebi and saw a whole lot of "You can not get Celebi or a GS ball without cheating (except for something on a Japanese version of Crystal?)" posts.
I had Pokémon Crystal on my Gameboy years ago and I remember fighting Celebi. I am 90%+ sure that I fought Celebi and 70%+ that I had a GS ball..
I also came across a youtube comment saying he used his GS ball because he thought it was just a random Pokéball.
As said, I'm quite sure I fought Celebi in Crystal but it either
a) Got KO'd
b) Was not able to be caught( As in a "The pokeball failed" kind of message)
So my question is.. Is there any way to get a GS ball on Crystal without cheating or glitching? And do you ever figh celebi?(Even if you can't catch it)