I have a minutly altered LEAFGREEN. Can I safely trade HO-OH and LUGIA to it without worrying wether it will erase my game? Please, please reply if you know.

Trading Ho-Oh and Lugia has never erased any games, you know. And by minutely altered, what do you mean? How have you altered your game?

I believe he used the 'Magic Door' Codes on Leaf Green to get Lugia and Ho-oh.

Those mess up your game by not letting you go in the Elite 4, Screwing up your trainer card and making you have 9999 Wins and 9999 Losses. These also delete any berries in your pouch and get your bag glitched up(Full Restore, in bag: ?53).

I would only use these if I was about to start the game again, but as they have glitched up my game about 6 times without me even knowing, I deleted those evil and cruel codes.

When I say minutly altered I mean that I did alter my game once, but then removed the cheat cartridge, so that it is no longer different. I read on 'pokemon.com' that putting a MYSTICTICKET on an altered cartridge could erase the game, so I wondered if trading HO-OH/LUGIA to an altered cartridge might do the same. I didn't cheat to get them, I useds a MYSTICTICKET. Sorry if my question wasn't clear.

Ah!! No, it won't get deleted.