Okay, so after I have beat the Elite 4, the Professor upgraded my Pokédex to National, then I went around to catch some legendary Pokémons ( I used some cheats for enabling events), but after I caught Ho-oh I checked the Pokédex for it I realized the National Pokédex is gone!
Someone said that I have to have 200 Pokémons in my Pokédex, but I had already seen all the 202 Pokémons. The person also said that it might be a glitch and I have to trade with FireRed/LeafGreen to solve the problem, but I can't even trade the Pokéons that do not exist in Hoenn Pokédex. Can someone help please? I really want the National Pokédex to trade with my friend.