Island Scan came up earlier. Since the mons that appear are predictable (based on day of the week) I'd argue it should be allowed? 10 quick scans and then an island scan to get a specific mon isn't so bad at all.
But, unfortunately, where on the island a mon appears seems to be random. So you have to have basically cleared it out before you can scan "safely." This makes most of the later island scan mons kinda dubious - like, Honedge would be really good on paper if you could get it early on island 2... (it trivializes Lurantis, which is amazing in and of itself) but if you try to do that, odds are it just spawns in somewhere you can't reach yet and despawns before you get it.
So, with this in mind: the island 1 mons are what come across as potentially interesting. Of these, Chikorita, Deino, and Klink all seem kinda worthless, so they can be dismissed outright. Horsea evolves too late and you're fucked if you don't get the 5% Dragon Scale.
The remaining mons that might achieve a relevant tier, then, are Cyndaquil, Litwick, and Totodile.
Totodile's the big winner here. It comes early, hits hard, makes good use of a whole lot of TMs, and gets the cheeky level 30 Gatr evolution. I'm probably gonna try to do a run with it, actually, because at least on paper this looks like a very solid pick. It's not the best early Water (Wishiwashi and Gyarados have immediate power; Wingull has a fast evolution into the amazing DrizzleBird) but it's durable, it hits respectably hard, and it's even "fast" for Sun/Moon ingame with 78 Speed. (thanks, Alobama)
Cyndaquil doesn't look bad, either! It's fast as hell, does alright damage, and its movepool is shockingly usable compared to the norm for Fire-types. Lack of Attack probably hurts it a lot in practice, though; most of what it wants to use is physical up until fairly late in the game.
Litwick is weird. I'm definitely gonna try to build with this because it seems like it's either gonna be pretty okay or super-duper-trash. You've got a really nice typing with Fire/Ghost, strongish Embers off the bat, Flame Burst right when Ember starts to get kinda bleh, and your early level-up movepool gives you cheeky shit like Fire Spin and Wisp... (Fire/Ghost + Wisp = FUCK YOU LURANTIS)
But your stats are just so damned bad. And it takes way too long for you to get a usable Ghost STAB w/ level 28 Hex or Shadow Ball on Route 14.
It seems like it should have a solid early game, and Chandelure would be rock-solid once you got it, but level 41 is just so damned late for the first evolution. I mean, I guess the silver lining is that level 41 means you're at or near Poni Wilds anyway, lol, so you may as well just go straight from Litwick > Chandelure.
But, unfortunately, where on the island a mon appears seems to be random. So you have to have basically cleared it out before you can scan "safely." This makes most of the later island scan mons kinda dubious - like, Honedge would be really good on paper if you could get it early on island 2... (it trivializes Lurantis, which is amazing in and of itself) but if you try to do that, odds are it just spawns in somewhere you can't reach yet and despawns before you get it.
So, with this in mind: the island 1 mons are what come across as potentially interesting. Of these, Chikorita, Deino, and Klink all seem kinda worthless, so they can be dismissed outright. Horsea evolves too late and you're fucked if you don't get the 5% Dragon Scale.
The remaining mons that might achieve a relevant tier, then, are Cyndaquil, Litwick, and Totodile.
Totodile's the big winner here. It comes early, hits hard, makes good use of a whole lot of TMs, and gets the cheeky level 30 Gatr evolution. I'm probably gonna try to do a run with it, actually, because at least on paper this looks like a very solid pick. It's not the best early Water (Wishiwashi and Gyarados have immediate power; Wingull has a fast evolution into the amazing DrizzleBird) but it's durable, it hits respectably hard, and it's even "fast" for Sun/Moon ingame with 78 Speed. (thanks, Alobama)
Cyndaquil doesn't look bad, either! It's fast as hell, does alright damage, and its movepool is shockingly usable compared to the norm for Fire-types. Lack of Attack probably hurts it a lot in practice, though; most of what it wants to use is physical up until fairly late in the game.
Litwick is weird. I'm definitely gonna try to build with this because it seems like it's either gonna be pretty okay or super-duper-trash. You've got a really nice typing with Fire/Ghost, strongish Embers off the bat, Flame Burst right when Ember starts to get kinda bleh, and your early level-up movepool gives you cheeky shit like Fire Spin and Wisp... (Fire/Ghost + Wisp = FUCK YOU LURANTIS)
But your stats are just so damned bad. And it takes way too long for you to get a usable Ghost STAB w/ level 28 Hex or Shadow Ball on Route 14.
It seems like it should have a solid early game, and Chandelure would be rock-solid once you got it, but level 41 is just so damned late for the first evolution. I mean, I guess the silver lining is that level 41 means you're at or near Poni Wilds anyway, lol, so you may as well just go straight from Litwick > Chandelure.