UPNetwork -> Anime -> Kanto -> Mystery at the Lighthouse
#13 "Mystery at the Lighthouse"
Angered by Misty's taunts that he's incapable of actually CAPTURING a Pokémon, Ash captures a Krabby without weakening it. The Krabby's Pokéball disappears, and Ash wonders where it went. But a trainer cannot carry more than six Pokémon at once, so that one has gone to Professor Oak. Ash is worried about his Krabby and wants to find a phone to call Oak. He does so, when the trio stumble upon a lighthouse. Oak tells them they are in the home of Bill, a Pokémon researcher whom they should learn from.
They find Bill, who is wearing a Pokémon costume to help him get into the mindset of that Pokémon (a Kabuto, long extinct). Ash has to help him get OUT of the costume before they can talk. -_-; Then Bill blathers on for a while about all the different Pokémon and how Pokémon's a wonderful field to get into whether you are a trainer or researcher. He says there is a mysterious Pokémon whose call he has heard across the ocean. Being an empathic Pokémon expert, Bill can understand the calls, which are those of loneliness, and wanting a friend. Bill sent his own message back over the ocean and now hopes this Pokémon will come to find him so he can just see it...
Then, the Pokémon comes! It is a huge Dragonite, but shrouded in shadow so Bill cannot tell what it is. It comes close to the lighthouse, and Bill is happy, but then Team Rocket shows up and fire guns at it to try and weaken it, since it is a rare Pokémon. (This was one of Team Rocket's more rotten schemes, even James felt guilty about hurting such a gentle, sad creature.) Dragonite is scared off, but Bill thinks it will come back some day...