How did you get Celebi? I thought the non-Japanese releases of GSC goofed up the code to have the GS ball trigger Celebi's Ilex Event. Mew I can understand easily even if you didn't go to an event since the RBY glitch is really easy to pull off once you get to Cerulean City and from there it's just a trade through time away.
By the way...It's Unown
