Glitch City, not really sure how it works in yellow. Red and Blue, however, this is odd.
First off, don't save once arriving and two, if you forget to save before getting there and would like to leave, simply bring a FLYing pokemon with you.
You go to the Safari Zone, and make sure u bring someone with dig. walk around for a bit, but not too much. about 50- 100 steps should be more than enough. DIG out of there, and get to Cinnabar Island. Do the Surf you would do to find missingno., only thing is you will run into safari pokemon instead. To include Scyther (Red), Pinsir (Blue) and Kangaskhan (Both). Surf until the timer goes off (Yes the same one that the Safari Zone plays when your time is up) and you will walk out of the Safari Zone. Voila, Glitch City, full of odd things, and you may be stuck in water at some point too.
catch Missingno
there really isn't glitch city but if you put in a specific cheat of something, maybe you might come across glitch city. WARNING: glitch city may not have a Pokemon center due to the glitches...
its not catchable in red blue or yellow but you can glitch it up and get it.
no, you catch different Pokemon in yellow, you get ALL 3 starters, and theres no glitch in yellow. :)
Sure! There's Glitch city To get it go to http://www.ocf.berkeley.edu/~jdonald/pokemon/glitchcity.html There is a glitched up Missingo Pokemon (I dont know how to get that) There is a mew also!
Your question is incredibly vague, I can only say three things about it, and those are this: 1. Yes, glitch city exists. 2. No there is no serious side effects of going there. 3. To go there, go to this site: http://www.ocf.berkeley.edu/~jdonald/pokemon/glitchcity.html
No. Missingno is a glitch pokemon found in pokemon Red, Green, Blue, and Yellow.
nope
cinabar island
No-- but I think you can use the Action Replay, or there might be a glitch that can make you Pokemon over lvl. 100. In the Red/Blue/Yellow versions, a glitch (called the ZZAZZ glitch) will make your Pokemon lvl. 153.
It is only possible to get Weedle in Pokemon Yellow by either trading it from Pokemon Red or Blue versions, or use the Mew Glitch and battle certain trainers.
You can get Magmar in Pokemon yellow on the Nugget Bridge in Cerulian City. All you have to do is use the mew glitch without gameshark. go to Vermilion City and fihgt the engineer near the first snorlax. Teleport or fly back to Cerulian and head to the Nugget Bridge. Magmar will be waiting unseen.