Other stuff, I thought to get a gligar you had to put two zubats in the daycare centre (this was in emerald).
In leafgreen if you had those letters you could put them in random npc's houses and they would go to the union room to battle.
In Silver I thought by putting a Doduo and Magmar in the daycare you would get a Charizard egg.
Also in Silver there was a rumor going around at school that if you gave a rare candy to a Level 100 Ho-Oh it would go to level 1.
And in Yellow I thought if your pokemon fainted at pokemon tower it would die, and a grave would be made for it there.