I didn't read all 15 pages. I only read the original post so these might have already been mentioned so I apologize in advance if they have. I just wanted to share my observations.
First Gen:
snorlax is unobtainable, however you can get a munchlax and then evolve it into a snorlax with max happiness.
Second Gen:
Togepi is available (at least was in episode 10) by answering the old man's questions in South Obsidia Ward. He gives you an egg which hatches into togepi. This also makes togetic and togekiss available.
Yanma is obtainable by just walking around in the grass (episode 11)
Magby is obtainable, or at least was at one point. I found it under a bridge during a rainstorm
Fourth Gen:
Starly is obtainable. You have to talk to it on a roof. I think it's in Obsidia Ward
Munchlax is obtainable. Headbutt trees in the wasteland
Riolu is obtainable. or at least use to be I think I read that when you trade a luvdisc you get a different pokemon now.You use to by trading a luvdisc to a girl at the academy.
Fifth Gen:
Cryogonal is no longer obtainable by trading a pidgeot. You need a stunfisk as of episode 11.
These are all I saw. Hope I helped!
