Looking over this thread, I'm a bit shocked at some of the stuff I'm seeing here. People seem to be taking this adherence to the concept thing really a bit far and freaking out over stuff that there's no reason to be freaking out on. Out of this, the Rain Dance hate here surprises me the most--it's stunning to see it anywhere near Controversial or Disallowed to me. There are a few other comments that I have, but Rain Dance is my main focus.
Anyway, Rain Dance for Allowed. Seriously, this reeks of re-Ice Beam to me, except worse, since the anti-Ice Beam people did have a bit of good reasoning, but, at least out of the posts I've read against it, people haven't really been following through as much on this one. Again, just like Ice Beam was, it is a move that a Pokemon like Krilowatt should instant-get typically, so unless there's a very good reason for it being disallowed, it should be let in. And so far, I'm not seeing that. RD is hardly going to break CAP10, and it's hardly the best option for a RD team when you've got stuff like Kingdra, Starmie, Gyarados, Kabutops, Qwilfish, Floatzel, etc. Even if it gets RD, I doubt it's really going to find its way onto RD teams that much.
And in fact, that doesn't even matter, since it can be used on a RD team regardless of whether or not it itself gets it, so I'm not seeing how this is an issue at all. Whether we deny it RD or not won't affect it's ability to be a member of RD teams: all that changes is whether or not it can set it up itself. And that comes to the next point: since, even if CAP10 gets Rain Dance, because it doesn't have access to moves like U-turn or blistering fast speed, it's very doubtful that it will be used as a RD lead. Pokemon like Azelf (due to it's speed and U-turn), Uxie (has some bulk, while also having decent speed, but most importantly in this case (as Krilly doesn't have it and it really helps for a RD lead) U-turn), Electrode (speed), and even Kingdra (due to having space for it due to covering everything with just its two STAB moves) are better in that field than Krilowatt, so it's doubtful that it will really see much use as a RD lead.
But in any case, what really hits home for me on this is how it's a typical move that Kriowatt should be getting anyway like Substitute and Protect, and how, even if its denied RD, it won't stop people from using it on Rain teams anyway if they want to (plus, CAP10 doesn't make the greatest RD lead anyway), and so, I'm not seeing the real point in denying it the option. Due to that, since it is a prevalent TM, it should be Allowed, unless someone can actually bring forth some good reasoning as to why Krilowatt would actually outclass stuff like Azelf and co as RD leads, and as a result threaten the concept by making it end up primarily used for that purpose (which, as I've explained, I'm not really expecting, since the typical ones seem to outclass Krilly in that department, so I'm not all that worried about it ending up dominating the RD lead market).
Beyond that, I just have a few musings, really, but nothing I feel as strongly about as Rain Dance. I'm leaning more towards Aqua Ring being Allowed. The move's pretty much a gimmick. Stuff like Milotic and Wallrein get it, but they just can't find the moveslot for it, because the move just isn't worth it. It's just 6% recovery per turn, and you don't start getting it until you give up that moveslot for it and find a chance to actually use the move. Plus, again, it's only six percent. You have to have used it and been out for over four turns before it even recovers as much as Moonlight and its clones would have in bad weather, nevermind normal or good weather. Plus, even combining that with Leftovers recovery, I'm not all that worried, as one of the abilities we were toying around with (Poison Heal) would have healed that same 12% per turn. Had we actually given CAP10 Poison Heal, then maybe I might have been a bit concerned with Aqua Ring in combination with it. But with the way things went, I can't say I'm really that worried about it, myself.
Lastly, I'd also like for Transform to be Allowed, as I'd love to test out a high-HP Pokemon that actually has the move. However, for that very reason, I'm scared that it could potentially be broken in standard play. However, that is theorymon, and I can't be certain of how well that would work in standard play. Krilowatt still has to find a chance to switch in and actually perform it, and once it does, at best, it's hoping on a Speed Tie if the Pokemon does have a move that's super-effective on itself. If it doesn't, it's basically hoping that the opponent actually switches and gives it a free turn of setup of some sort (and in both cases, due to the 5 PP on all moves, it's ability to do all that much... is a bit limited). If the opponent actually does have something like a Dusknoir or Shuckle, it could be a bit much, but that's extremely situational, and relies on the player actually having Krilowatt and the opponent Dusknoir/Shuckle, which is rare. Plus, neither Dusknoir or Shuckle have access to reliable recovery and Dusknoir's main method of healing itself, Pain Split, isn't so great with high HP and would work against Krilowatt there. But in any case, it's hard to say where this would go exactly, so I'd like to see it Allowed for now, unless someone can convince me that it's broken or something. But as I said, this is more just a personal musing of mine, and is more just something I've just always been curious about moreso than anything, so I won't actually push too hard on this one either way. Either way though, it would be nice to see some more opinions on this.