Ambipom is not that bad at all, he should be a bit higher imo
You could actually provide some actual reasoning as to why you think Ambi is even halfway viable, much less deserving of a rise.
Ambipom's Fake Out is a 'jack of all trades, master of none' priority move, which is frankly terrible since you OHKO nothing with this and you're basically forced to sac another mon just to use it again against a boosted threat. This is pretty much the worst way to revenge kill a mon, especially when you have better priority such as Ice Shard, Sucker Punch/Shadow Sneak, Aqua Jet, and Mach Punch, or a decent selection of Choice Scarfers in the tier. Even against +2 setup sweepers Ambi doesn't hold a niche, since Klinklang and Rhydon just laugh at you and weather sweepers are already shut down by Vanilluxe. Shit, even Medicham proves to be a better Fake Out user by the end of the day, since it can at least follow up with Bullet Punch to rack up the damage, and even these two moves aren't very viable on Cham.
Ambipom also has barely any worth as a corebreaker. It's already eclipsed by Sneasel for the most part, but even on its own merit, Ambipom just gets bodied too hard by so many bulky mons, such as Rhydon, Slowbro, Diancie, Palossand, etc., even Piloswine can just switch in on any move (even Knock Off) and still win since Ambi can't take a hit worth a damn and doesn't do enough damage to justify its atrocious bulk and especially zero defensive utility. I mean, you could consider Skill Link Tail Slap for just a bit more raw power, but not only is that still not winning you much matchups against bulky things, but you also give up Technician Fake Out, which is the whole point of even using this awful mon.
Speaking of Skill Link Tail Slap:
It's starting to come to my attention that Cinccino
doesn't actually need STAB to function. While it seems like an asinine idea to forgo raw power on a mon which seems to badly need it (especially as an offensive Normal-type), I find that Bullet Seed and Rock Blast just seem to do the majority of heavy lifting for Cinccino in this meta already, while Tail Slap doesn't actually help that much; if anything, Tail Slap being the least accurate of its multi-hit moves as well as making contact only seems to serve as liabilities imo. Bullet Seed and Rock Blast are pretty damn great for most of the bulky mons in this meta, smacking things like Rhydon, Diancie, Incineroar, Golbat, Slowbro, Vaporeon, even
Pyukumuku, etc., and kills plenty of offensive mons as well.
If Cinccino forgoes Tail Slap and sports a moveset of Bullet Seed, Rock Blast, Knock Off, and U-turn,
its matchups barely change at all, or more specifically, Tail Slap doesn't really better most of Cinccino's matchups. You do miss out on some raw power against things like Fighting- and Normal-types, but consider this:
- Mega Audino doesn't care about your extra damage anyway, while the likes of Trick Room Aromatisse, phys def Hariyama, and Scrafty can still tank the hit and retaliate hard.
- Some of these mons are faster, like Sceptile, Whimsicott, and Scarf Passimian, so Tail Slap isn't hitting those outside of on the switch, and even then they don't like switching into an unresisted 125 BP move, even if unSTABed.
- Some of the frailer mons, like Heliolisk, Medicham, and Hitmonlee, risk getting blasted by LO/Choice Band Bullet Seed as is, give or take SR damage depending on the item.
- Some of the non-resists, like Garbodor, Druddigon, and Vileplume, can punish Tail Slap for making contact.
- U-turn can punish super exploitable mons like Comfey and Miltank, or do a chunk to things like Guzzlord (as well as OHKOing Malamar :/)
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Tl;dr: Bullet Seed and Rock Blast are so good for general damage on the tier that Cinccino doesn't even need Tail Slap, with Knock Off and U-turn being sufficient counter-responses against most things that can take the Grass + Rock coverage or Tail Slap just being outright bad. Oh and Ambipom sux don't use it.