I remember thinking about what I should use it on and then I saw articuno through those binoculars and I fell in love with it - it looked so pretty! (Yellow)
So I caught an articuno and loved the thing dearly.
xox

In Yellow version my sister used it on an Onix (supposedly, it disappeared is all I know) and I had one hard time trying to catch Mewtwo

uuuuh i was an idiot and used it on a because it wouldnt go away and i was told to use it on mewtwo but i didnt want to and well i started over and ended up using it on a mewtwo thankfully

I *think* Mewtwo. ..but it might have been one of the legendary birds.. it's a loooooooooooong time ago.

My brother told me that masterball could even catch other peoples pokemon.So i threw mine at a lvl 70 venasaur and the masterball flew away,empty, and was never seen again.

i never got that far but my friend needed to use fly so he used it on a pidgey lvl 2

Well when I was at a friends house, I saw the game and had never played it before. So I picked it up and battled some random pokemon, and when he saw me the Masterball on a random pokemon he jumped over the couch ninja-style and turned off the Gameboy. Sigh, good times...

I used on Moltres on my first poekmon game. Man I was so stupid! Then I did it on all my other Kanto games til I learned of the other legendary birds and Mewtwo. I felt like fesetting my games to use it on Mewtwo instead, like my friend did when MOltres flew away during battle, but I couldn't do anything to my Charlie and Squindle (charizard and blastoise).

i used mine on my zapdos. ran out of pokeballz and forgot to save. lol didn't wanna turn off and turn back on because i trained my venusaur up like 30 levels.Has anyone else noticed how good pokeballs are in this game i just went and caught moltres and articuno with 3 pokeballs. ( I started playing this again)

Maybe the Pokeballs are so good because there aren't that many types of balls, or you just got lucky...? It's been a looong time since I played the original GB games, so I don't remember if I was that lucky, but I know they're not that good in FRLG, cus I tried a few times with ultra balls against Zapdos and Articuno on FR and they woulnd' be caught.

i can't even remember, it was so long ago. in yellow i don't know if i ever got to the legendaries, in blue i used it on either one of the birds or mewtwo. i can't find my blue and red to finish my game though.

Well, for Christmas one year I got Yellow, my first game. I didn't wanna screw the coding up or anything (I was like 6 or 7 haha I didn't know) so I didn't use the multiplication cheat. Come to think of it I don't think I even used the masterball in Yellow, I caught all the birds with ultraballs and didn't even know mewtwo was in the game. A few months late I picked up Blue and eventually Red and used the multiplication code and caught literally everything in masterballs.

Well, I had a friend that helped me out with the master ball and told me that there's a far more powerful pokemon to be caught by it...

So thankfully, I used it on Mewtwo...

my friend who was a couple of years older than me , had flew through the game ( getting it a day later than me aswel ) , and told me to save my master ball for mewtwo, so i did

One time, my cousin carelessly used it on a golbat, and I was like, "NOOOO WHAT THE HELL ARE YOU THINKING!" He thought it was a normal old pokeball, just different color.

I wasted mine trying to catch that ghost marowak

I wasted mine on a snorlax.

My first ever Master Ball was used on as I did not want to use it on anything but found out that Mewtwo has the highest catch rate back then & I just threw the Master Ball & said forget it, I got my Mewtwo & went on about my life. This was in Pokemon Blue.

I found my old red version about a month ago and finally got through victory road and beat e4(and i caught mewtwo with masterball)

unfortunatley for my friend, he wasted his on a caterpie a few years ago i think.

I used it on*cough*a lvl 4 rattata*cough* I didn't realize what I had thrown until I was facing Mewtwo a few minutes later, and didn't have my Masterball. This was in Blue Version.

I remember when I was a kid I wasted it on some pokemon (psyduck I think) Then when my older bro told me that it could catch any pokemon without fail I was like this

I used mine on a Gyrados I found in the Safari Owner's (The guy with gold teeth) backyard. I knew it could catch anything..but back then I wanted a Gyrados soooo badly and I couldn't catch the thing with ultra balls!!

lol, back in the day when i had yellow version, i spent over five hours trying to catch an abra, but the dang thing kept teleporting away, and ultra balls werent working. despite knowing about the master ball and that it could catch anything, i got so fed up that i INTENTIONALLY threw the master ball at an abra XD. incidentally, i caught the mewtwo with a pokeball. go figure.