the one that i can rememeber is fighting missingno to get unlimeted masterballs.

Same here.Missing No. was a cool glitchy pokemon,and not only did i use him to increase my masterballs,but also my TMs,Rare Candy and Nugget(For More Money)and then same with the other useful items,you would know many of the useful items if you are an experienced pokemon trainer. ;)

Agreed. I totally love that one. And if you caught him apparently it screwed up your game. Dunno if that's true, anyone know for sure? But remember all the high pokemon levels? Those old one's aren't as good in some graphics but I love that. Red was my first pk game. Yeah master balls. Totally cheap but fun. Also, you couldn't always run away..it was stupid.

This is a cool glitch,try it out:
Do the missingno. trick and fly to viridian city and talk with that old man,but instead of flying away from that guy near the Lavender-->Celadon Underground path,Fly away from somebody else.then talk to the Viridian City Old Man Dude.Now instead of encountering Missingno. you will encounter some other pokemon.I even got Golem and Gengar with this once!

You mean besides missingo at a high level? Yeah he doesn't appear everytime. Don't you have to talk to the old man either way? You said fly away then go back to viridian man twice...can you clarify on that a little more? My memory on missingo may be hasey, but you can catch high level pokemon as I said before.

missingno. was cool but i always thoght he loooked very odd