Thanks a lot man, I really appreciate you're rooting for me. About the analysis, I'm sorry I've been not able to respond in the same level as before, but I get trapped with work almost everyday, but I'll sure check that when I have the proper time to do so.
Hey, do you think you could look over GSC Blissey? Jorgen made some really good suggestions, but I'd like to have a reinforcing opinion before I make set changes and all that good stuff. Thanks for your time!
Wow I can't believe I forgot to answer your last VM! My bad, but answering your questions now. The main set in my opinion is Hidden Power Bug - Spikes - Toxic - Rapid Spin. Its function is basically to setup Spikes and Toxic to annoy things. Its partners are basically the standard stall mons like Raikou and Snorlax, I think in this section it would be better if you could use the knowledge you have of the metagame. 'What separates from Cloyster?' is pretty easy to answer, they are way too different! Cloyster is more of an offensive mon, in the other hand Forry is basically almost all defensive.
Feel free to ask more, but Forretress will need more than 1 set for sure. Rest, Earthquake, Sleep Talk, Hidden Power Fire, Reflect, Light Screen, Curse, and Explosion are all usable moves for that specifc mon. I suggest you to go through Forry's movepool and to study a little more, than you can make a new thread. But again: feel free to ask anything you want about it, I appreciate you ask me.
Thanks for the offer! After Cloyster gets GP'd I was planning on doing GSC Forretress next. What kind of set does it run? How would you use it in battle? Most important function? What seperates it from Cloyster? Good partners? What kind of teams is it used on? Sorry for all the questions, but I want to do the best job possible!
Feel free to VM to ask about anything you want to know about usage, set, and whatever you want to know before actually writing the analysis. Maybe this will reduce the amount of times you have to edit the OP with other people's suggestions.