Tynamo even with lucky egg plows through the flying gym.
I've used Tynamo in my in-game run, it was terrible, it got OHKO'd by everything and levelling it up is like shitting bricks, however it picks up its slack after it evolves(should be around the 7th Gym) where it gets Crunch, by then you should be able to get Eelektross and teach it Thunderbolt and Rock Slide/Grass Knot/Whatever for coverage, it was good in some boss battles but I never found it to be too good, for Water types Sawsbuck has always done the job faster, and most Flying types are rather frail. Sawsbuck can at least sweep the Dark E4 once Scrafty is taken out.
TL;DR : Tynamo belongs to Low-Mid at best.
I'll also rate the pokemon I've used for ingame runs
Oshawott: High: It was useful throughout the whole game, it only starts faltering after the Elite Four, he has a good level up movepool alongside TMs that further support it.
Drillbur: Top: This thing is beast once it reaches Level 19, from there onwards it just kills, it falls a bit during the early 20s and before evolution, but then it gets Rock Slide to make up for it and you can do like I did and delay evolution back 2 levels for Earthquake.
Scraggy: High: It gets a strong level up movepool with near flawless coverage, high defenses make up for the below-average speed and High BP moves make up for its somewhat average attack. getting Hi Jump Kick at level 31 just secures its spot for High tier, imo this thing deserves to be at the top of High or the bottom of Uber, I originally intended to ditch it when Mienfoo was accessible but I ended up keeping him. (I raised Mienfoo later)
Solosis: Mid: Its selling point is the high Special Attack the instant you get it, other than that it doesn't have much going on for it, its power(In base stats) caps out at Level 32 which is both good and bad(As Reuniclus just adds bulk), he desperately needs coverage, luckily the one I used had a Bug Type Hidden Power which dispatched Dark Types.
Deerling: Mid-High: Yes, its stats are fairly poor at the beginning, but it gets Take Down, Jump Kick and Faint Attack just as you get it that somewhat make up for its attack for the time being, it truly shines when it evolves, at base 95 Speed it outspeeds lots of things in the game and KOs/2HKOs. Can Arguably reach high tier but I think thats a bit too much for it.
Tynamo: Already Discussed
Mienfoo: Mid/Mid High: He's late in the game, and you probably could be having Scrafty/Sawk/Conkeldurr/Emboar by now, Mienfoo can use Jump Kick/Rock Slide(assuming you went to Mistralton cave) when you first get him so coverage is not an issue, at Base 65 Speed he's faster than most fighting types in the game, its evolution is late, but its possible to get Mienshao right before the Elite Four, by then it gets Base 125 Attack and 105 Speed thats very helpful against most of the E4(Along with N and Ghetsis), Mienshao can possibly downright outspeed and KO Hydreigon. While he's certainly not Top/High due to late access and evolution, I think he shouldn't be anywhere near Low as its damn easy to train him right from the start(he levels up fast too) and gets really useful near the end.