I figured out a glitch to capture a Level 7 Mew in Pokemon Red Version without Gameshark or Action Replay. Heres the Instructions:
Intro & Preparation
First of all, make sure the game you’re playing is Pokemon Red, Blue, or Yellow Version. Now start by making sure you have a Pokemon capable of fly or teleport (fly is preferable). Make sure you have an adequate suplly of Pokeballs (Great Balls, Ultra Balls, etc.). Make sure you have a pokemon capable of weakening a level 7 Mew. Lastly, ensure that you have not battled with the guy with the Slowpoke on Nugget Bridge and the Gambler in front of the underground passage next to Lavender Town.
Tutorial
Start from Lavender Town and walk towards the Underground Passage. Make sure the man doesnt spot you and go inside. Save the game in case you screw up from here. Next, take one step south, you should be right outside the door but you shouldnt be able to see the Gambler. Then, take one step south and press start immediately after (if he sees you and your start menu doesnt show, reset your game and repeat the steps above until you get it right). Then, select a flying pokemon with fly and fly to Cerulean City (or teleport back to Lavender and walk back to Cerulean). You will notice an exclamation mark above the Gambler’s head but you fly away right after. Once in Cerulean, head north to Nugget Bridge (towards Bill’s House). You will notice that your start menu doesnt work because the game thinks that you’re in a battle with the Gambler and during battles, the start menu is disabled. Then, go battle the guy with the Slowpoke but make sure he walks up to you (if you walk up to him, your game will freeze). Beat his Slowpoke and you win. Then, fly back to Lavender Town. Head west, back to where the Gambler is. Your start menu will suddenly pop up. Press ‘B’ to cancel the menu and a Level 7 Mew will appear. Weaken it, catch it, and enjoy.

your gay
June 14th, 2008 | #
Can you fight anyone else appart from the slowpoke guy?? please leave a comment on my page! thanks!
June 14th, 2008 | #
you can catch every pokemon with this trick, you just have to know which hexacode the pokemon has
June 14th, 2008 | #
i think it will just be different pokemon.
June 14th, 2008 | #
Nah
June 14th, 2008 | #
does this corrupt your game files?
June 14th, 2008 | #
crystal is the best imo.
June 14th, 2008 | #
ur gay
June 14th, 2008 | #
can u do the same thing with other trainers???
June 14th, 2008 | #
Sorry, that last comment was a load of crap, its late
thats not how you catch a mew, the way to do it is the way this video shows. But my comment was right in that I have caught a Mew this way, and its because not engaging the npc in a fight messes with the games memory.
June 14th, 2008 | #
This isnt an emulator. Ive done it myself to catch a Mew. This video is complicated though, the way it works is you need to walk up to someone so they would engage you in a fight, but very quickly press start to open the menu, and then either fly or teleport to Cerulean City, and run pass Nugget Bridge and go left into the grass. You mess with the CPU of the game by not engaging the npc in that fight, meaning that it can generate new wild monsters, one of those wild monsters being a mew.
June 14th, 2008 | #
i don t think this was just normal playing because i am not sure ifi its the camera or not but it was scratchy sort of but i think he used one of those emulators.
June 14th, 2008 | #
Used to? It still does. Diamond/Pearl is definitely the best game in the series. My only complaint is that battles move really slow in comparison to RSE.
June 14th, 2008 | #
POKEMON…THE GOOD OLD DAYS
June 14th, 2008 | #
I remember this glitch. It is actually somewhat recent. It took a while for people to figure this one out.
June 14th, 2008 | #
Where did you download it?
June 14th, 2008 | #
Pokemon used to totally kick arse
June 14th, 2008 | #
no my friend you dont
June 14th, 2008 | #
its a fucking mew, of course its strong, thats why people want to get him. retard
June 14th, 2008 | #
just red
June 14th, 2008 | #
Question… Is that “FireRed” or just “Red”?
June 14th, 2008 | #
nice one mate, this is a class walkthrough and helped me get a mew.
cheers
June 14th, 2008 | #
probably google
June 14th, 2008 | #