Pokémon Black Version, Solo Scramble, Starring Shelly the Oshawott, UPDATE.
Took on Route 3, including Cheren, and took on Team Plasma in Wellspring Cave. Shelly is at Level 21 at the time of this update.
Edit: Took on N for the second time, and he was rather easy... compared to Lenora. Her juniors were rather easy as well, but Lenora herself proved to be troublesome. I needed a critical on Watchog without Herdier's Take Down getting a critical on Shelly. Lucky I got that outcome on roughly my 5th try at her. Because of this, Shelly is now at Level 24. By the way Water Pulse (which I would have learned at Level 23) is on my banned moves list.
Edit 2: Made my way through Pinwheel Forest to retrieve the Dragon Skull to give back to Lenora, catching a Pidove that I need for flight in the process. Arrived in Castelia, battled Team Plasma and a round with Victini in Liberty Garden. Ready to take on Castelia Gym, Shelly at Level 27.
Edit 3: Made it through Castelia Gym, including Burgh. Leavanny was one tough cookie... I lived the Razor Leaf on 2! (this needed a few more rounds with Victini) after which Torrent-boosted critical Razor Shell took it out. Next up, Bianca, and then Cheren. I had to have been confronted with Leech Seed... twice! (Once from Bianca's Pansage, once from Cheren's Servine) then made my way to Route 4. Made it to Nimbasa, N was easy enough... but the Gym was much tougher, which I expected from the get-go. I needed Shelly on ~50 HP out of 86, at Level 35, and poisoned (I say poisoned because 1, that prevents my Razor Shell from activating Emolga's Static Ability and 2, the passive damage is needed for Torrent range; thank Arceus poison damage does not accumulate on the field in BW, at least when I only have one Pokémon in my party, in this case Shelly the Oshawott), and I ended up catching a Gothita in the process.
The plan is this:
Turn 1, Emolga 1 Volt Switch, I live on ~20 (28 is Torrent range), Razor Shell KO's Emolga 2, Emolga 1 comes in.
Turn 2, I use lemonade to heal to 86, Emolga Aerial Ace. (Not Volt Switch because Zebstrika KO's me with Spark.)
Turn 3, Emolga Volt Switch, I live within Torrent range, Razor Shell KO's Zebstrika, Level up to 36 (max HP 88), Emolga comes back in.
Turn 4, I use Super Potion (or fresh water) to heal almost all the way, to ~70, Emolga Volt Switch, no critical.
Turn 5, same as turn 4, and this same deal continues to turn 6 (and possibly turn 7) until Shelly's HP are ~40.
Final turn, Emolga Volt Switch, I should live unless critical, Razor Shell KO's Emolga.
Edit 4: Took on Cheren again, then teamed up with Cheren and his Liepard against Billy and Susan and their Herdiers. Liepard lived on low (5 I think?) and Shelly sustained no damage. On my way to Driftveil City with Shelly at Level 37. That Eviolite sure comes in handy!
king of Kong's you mean cyndaquil not torchic?
By the way this should be Stickied.