Can somebody try to confirm/reject my assumption that having the No Guard ability drastically improves chances of secondary move effects happening against the No Guard pokemon?
I haven't used No Guard before this gen, but no wiki states anything like that about 5th gen behaviour.
Someone did, earlier - they mentioned that they had used Iron Head with their Doublade numerous times with little to no flinching happening even when they are faster (and I can also concur with this, having a similar experience). No Guard has never had that effect before, and given my experience with it I doubt that's been changed. If you're experiencing a phenomenal amount of hax with your No Guard poke, also remember to see if you have used it a lot in Pokemon Amie, since that might have an effect on this.
I don't know if anyone confirmed this or had any doubts about this, Sheer Force still cancels Life Orb recoil when using a boosted move.
Raseri and I confirmed that a while ago. We still have to test Eject Button though, if you are interested in testing that (I don't really want to go get the BP for it right now).
Does Boomburst bypass Substitute like Hyper Voice? Also, does Round and similar attacks(Echoed Voice?) also do this?
Yes, they all do. All sound-based moves (those blocked by Soundproof) bypass Substitute.
Raseri and I tested various effects of Protean, as suggested by BowserSama this morning on IRC.
- Using Sleep Talk with Protean results in the Pokemon's type being changed to the chosen move. It is not changed to Normal (the type of Sleep Talk), nor is it changed to Normal then to the chosen move.
- Using a Grass-type move to change to Grass-type gave the Pokemon immunity to spore and powder moves, as all Grass-types are. The same presumably goes for other types with status immunities - Steel's immunity to Poison, Electric's immunity to paralysis, etc.
- Unlike Stance Change, Protean will not change a Pokemon's type when it is asleep, regardless of the move chosen. It will also not change if the Pokemon hits itself in confusion. Things not tested: full paralysis, attraction - both presumably also perform the same, though it's worth testing.