Rest in peace, Technician Mega Abomasnow. Perhaps another slate will welcome you someday. Anyways, onto the current slate.
Nasty Plot Tornadus-T: This one is interesting to say the least, though I'm not that interested in it. On one hand, Tornadus-T can break through bulky offensive teams quite easily after a single boost. On the other hand, Air Slash is too weak, and Hurricane and Focus Blast are way too unreliable with their garbage accuracy. He does have some decent coverage options, but the lack of a reliable and powerful STAB attack can really get in the way of a sweep. I'm really iffy on this one, but there might be something that I'm missing, so I'll let other people talk about this one for me.
Steel-type Avalugg: I came up with this one, so pardon my bias. Steel-type Avalugg sheds his horrendous Ice typing and gains a plethora of resistances, as well as a Toxic immunity, which is always nice for a defensive Pokemon. His Special Defense is still pretty terrible, but his physical walling capabilities are so good now that it isn't even funny. To put it into perspective, Choice Scarf Garchomp's Earthquake is incapable of scoring a 2HKO, even after Stealth Rock damage (which Avalugg resists now). Yeah, that's pretty awesome.
Intimidate Milotic: Another of my ideas, and sorry again for any bias. With Intimidate, Milotic doesn't have to rely on ResTalk to activate Marvel Scale, and can come in on physical attackers anytime. There are two reasons why Intimidate is more convenient than Marvel Scale: you don't gamble on Sleep Talk to fight back, and you can potentially give a teammate a free switch due to the enemy's Attack drop. This not only provides support for your teammates, but it also gives Milotic more freedom with her moveset. Recover obviously replaces Rest, while you have either Magic Coat or Mirror Coat for the fourth option. Magic Coat can punish Pokemon trying to go for Toxic, Stealth Rock, Taunt, etc..., while Mirror Coat punishes special attackers trying to avoid Intimidate. Simply put, this is a Theorymon where everyone on the team wins.
Poison / Steel type Weezing: Quite an interesting Theorymon. With the Steel typing, Weezing gets a buttload or resistances, but sets himself apart from other Steel-types with Levitate and a Poison typing, with the former ridding him of what would be a 4x Ground weakness, while the latter rids him of a Fighting weakness, with Fire being his only weakness, and it isn't a 4x weakness either! Sadly, his lack of recovery really hampers his staying power, and his Special Defense is still kind of bad, so he has a lot to prove to get my attention.