[Meta thread] Iron's PokeRole Adventure: The Skull Ruins

[Dragonstrike]

Hmm....well, she's also a snack for the menacing Ghost type, but between Screens and Recover all her woes are pretty much taken care of as well as the group's Pokemon, and can learn Rollout to even be able to do stuff to Dark types. She can also learn Snatch rather easily too, and with Shiva's help can possibly be tutored with After You, Trick, and Confuse Ray, and definitely Wonder Room, Heal Block, and Charm, making her VERY good support beyond just setting up dem Screens. She can also learn Skill Swap as well, which can be either a disruptive tool and/or a way for them to gain additional advantages, provided you can rush for it in time. If you can teach her Regenerator, she won't even need healing Items if managed properly, and with Skill Swap she could also give that healing to another Pokemon long enough to help them out too. 

Overall, Solosis is actually a pretty good choice to take along on the trip, though she'll need to be cared for and trained to the point she gets all the Moves she needs to actually pull her weight. Taking her along also makes taking along Emolga , Solomon, and/or Princess even tougher, as doing so would increase the amount of dire weaknesses on your team waiting to be exploited and force you to juggle which one to to train at a given moment, as all of them + Solosis (bar maybe Solomon) need time and XP to become more useful additions on the trip. If you want, though, I could leave Edmundi behind and take her in his place, as their Screens would provide much the similar Defense as Double Wide Guard Spam, though I'd/the group would lose out on the ironclad dino's powerful offense as a consequence. That, and I don't know if they would listen to Terra in the first place, due to either Loyalty issues or him just being too spooky for her.

Wonder Room probably isn't the best move to use for anyone in the group except Shiva given she's the only character with higher Insight than Vitality.  Nathan and Spira wouldn't see any benefits or dwonsides since their current Vit scores equal their Ins scores, but Heart and Terra would definitely mind quite a bit (mostly Terra).  

Shiva's bringing along Gothitelle, so Heal Block support is present if needed already, so that isn't a big concern either.

Unfortunately, of the ? moves you listed, the only one actually listed in the book is Confuse Ray.  The other two ? moves are Acid Armor (which would be pretty useful, admittedly) and Night Shade (really only relevant against Dark types since all Solosis know Psywave)

Solosis's current Ability is Overcoat.  Regenerator would probably be a semi-costly exp investment since it's a HA.  Either it or Magic Guard would probably be a lot better in the long run for her than an Overcoat without Powder immunity built into it, though.

I'd probably recommend Nathan having Solosis in his party if she comes along simply because he can get the screens up the most quickly (and IC, Solosis is most comfortable around him).  The earlier in the Round the screens go up, the more effective they are.  That, and Nathan has the most Gym Badges atm, so her Psywaves will do 6 D6 (which is equivalent to using a 5 Strength 5 power STAB move against a 5 Vit enemy, or a 5 Strength 3 Power STAB against a 3 Vit enemy), meaning there'd be very little DPS loss from having her on Nathan's team in particular unless she's facing a Dark type.

On the topic of Solomon real quick, he has enough tools that learning more ASAP isn't entirely necessary, he'd just probably appreciate having some stronger ones to use.  Before Brine gets powered up, his damaging moves are all an effective 3 Power.  His access to Disable might help make up for it, though, and if he hogged a bunch of exp he could get Heal Pulse.  Or he could maybe learn Nasty Plot to shore up his offenses a little instead. But again, those buffs would be moreso 'nice' rather than 'necessary' (unlike bringing along Princess, who still has to learn several key moves before her true potential is unlocked).

Other Pokemon from that list that Nathan could possibly loan out are Grid (has Thunder now, so high Dex is not required for high Electric damage, unlike with Emolga learning Electro Ball), Snivy, Ray (probably unnecessary on this list if Solosis is being included), Emolga (as stated previously, probably better in Nathan's party in case he learns Electro Ball), Dedenne (maybe?  She's rather hyperactive since she's very young, so maybe not...), Solomon, Porygon-Z, Ditto, and Mizu (though she doesn't particularly like being around Shiva).