Plot hole: At the Ruins of Alph, when you solve your first stone puzzle, you fall down to the ruins, where there is a "strange presence". Now, you can encounter Unown, a Pokemon. After this, you tell the scientists nearby about them, and help them solve the puzzle. However, if you make it out of the Ruins without seeing any Pokemon, talk to the scientists and they still know about them, even though you haven't seen them.
Trivia: There are some secret trainers near Goldenrod City. To get to them, surf on the water next to the Daycare House. Keep going down until you reach land. These trainers have nothing special, they just train your Pokemon and give you money. However, the trainer facing up will give you Soft Sand after defeating her, which ups the power of ground moves. There is also some rare candy on the island a bit further up. It is in a tree.DoubleCheese14