Tracekun

I noticed in Game, and in the wiki, a kind of paradox. Some Pokémon can learn certain moves through TMs, but not through tutors. For example I ran into this problem while training a Sandslash, wanting to teach it the 'throat chop' move; for this exist an trainer at Celadon City. but, one e there I discovered that it cannot learn that move. Onli at that point, by looking again at the wiki I've noticed that anomaly. It's really disturbing, by the fact that the TM itself cannot be obtained in game, so why there is this disalignment?

Sorry to bother you, but can someone tell me where I can find a guide to trading? Searching the forum, I found a guide with theese abbreviations used in chat: But how does the trading work? when someone answers to my announce via pm, how can be done the exchange itself?

@Eaty But it's possible to help with those? Is there a way for one of us to offer our help, a guide to generating a set of animations to submit?