Add 50

[ReKoil]

There are currently 400 Pokemon in Scarlet/Violet (plus some additional ones not part of the Dex). If you had the opportunity to add any 50 Pokemon from previous generations to the game, which Pokemon would you add?
Keep in mind that you'll be adding the entire line if the mon is part of an evolutionary line. For example: Adding Hitmontop, means you'll also add Tyrogue, Hitmonchan & Hitmonlee, which is 4 slots out of 50.
If 50 is too much for you, let's just say 50 is the upper limit, you can do less if you want.

Here's a full list of all unobtainable Pokemon: https://www.serebii.net/scarletviolet/unobtainable.shtml

My own list is in the below spoiler:

Spoiler:

In no particular order:
1. Horsea
2. Seadra
3. Kingdra
4. Staryu
5. Starmie
6. Lapras
7. Gligar
8. Gliscor
9. Lotad
10. Lombre
11. Ludicolo
12. Sentret
13. Furret
14. Swinub
15. Piloswine
16. Mamoswine
17. Plusle
18. Minun
19. Feebas
20. Milotic
21. Beldum
22. Metang
23. Metagross
24. Blitzle
25. Zebstrika
26. Kecleon
27. Absol
28. Snivy
29. Servine
30. Serperior
31. Tepig
32. Pignite
33. Emboar
34. Espurr
35. Meowstic
36. Wimpod
37. Golisopod
38. Taillow
39. Swellow
40. Minior
41. Glameow
42. Purugly
43. Skitty
44. Delcatty
45. Chikorita
46. Bayleef
47. Meganium
48. Totodile
49. Croconaw
50. Feraligatr

 

[Hero-of-Time]

Jangmo-o line
Beldum line
Sewaddle line
Skorupi line
Poliwag line
Bellsprout line
Geodude line
Zubat line
Spheal line
Aipom line
Gligar line
Rhyhorn line
Togepi line
Swinub line
Aron line
Trapinch line
Honedge line
Absol

And, by my count that makes 50.

 

[Sandslash Fan]

Sandslash lines. I want to tera my boy!

 

[Corveone]

*Duraludon **Clobbopus **Gossifleur *Dhelmise *Turtonator *Minior *Comfey **Cutiefly **Phantump **Helioptile **Inkay **Pancham **Frillish **Joltik ***Leavanny ***Venipede ***Budew **Bidoof *Relicanth **Baltoy ***Lotad *Miltank **Gligar **Natu **Chinchou ***Horsea

 

[Squirtkipfan01]

Squirtle 50 times
Not even the line, just squirtle

 

[Hashimi]

Chikorita/Bayleef/Meganium - 3
Cyndaquil/Quilava/Typhlosion - 6
Totodile/Croconaw/Feraligatr - 9
Snivy/Servine/Serperior - 12
Tepig/Pignite/Emboar - 15
Oshawott/Dewott/Samurott - 18
Chespin/Quilladin/Chesnaught - 21
Fennekin/Braixen/Delphox - 24
Froakie/Frogadier/Greninja - 27
Sewaddle/Swadloon/Leavanny - 30
Venipede/Whirlepede/Scolipede - 33
Miltank - 34
Kangaskhan - 35
Gligar/Gliscor - 37
Timburr/Gurdurr/Conkeldurr - 40
Furfrou - 41
Minior - 42
Slugma/Magcargo - 44
Porygon/Porygon-2/Porygon-Z - 47
Beldum/Metang/Metagross - 50

 

[Sweet Serenity]

Personally, I would add a lot more than 50, mainly because so many Pokémon are missing and there is a huge lack of variety in the selection, but the first 50 that come to mind for me are as follows:

1. Staryu
2. Starmie
3. Reshiram
4. Elekid
5. Electabuzz
6. Electivire
7. Snivy
8. Servine
9. Serperior
10. Totodile
11. Croconaw
12. Feraligatr
13. Torchic
14. Combusken
15. Blaziken
16. Litten
17. Torracat
18. Incineroar
19. Magby
20. Magmar
21. Magmortar
22. Horsea
23. Seadra
24. Kingdra
25. Caterpie
26. Metapod
27. Butterfree
28. Inkay
29. Malamar
30. Poliwag
31. Poliwhirl
32. Poliwrath
33. Politoed
34. Abra
35. Kadabra
36. Alakazam
37. Machop
38. Machoke
39. Machamp
40. Lotad
41. Lombre
42. Ludicolo (How did it not make it when it fits the region so perfectly?)
43. Nincada
44. Ninjask
45. Shedinja
46. Yanma
47. Yanmega
48. Kartana
49. Stakataka
50. Nihilego

Personally, I would add at least another 400.

 

[FeraligatrMaster]

1: Bulbasaur
2: Ivysaur
3: Venusaur
4: Squirtle
5: Wartortle
6: Blastoise
7: Chikorita
8: Bayleef
9: Meganium
10: Totodile
11: Croconaw
12: Feraligatr
13: Snivy
14: Servine
15: Serperior
16: Tepig
17: Pignite
18: Emboar
19: Litten
20: Torracat
21: Incineroar
22: Popplio
23: Brionne
24: Primarina
25: Machop
26: Machoke
27: Machamp
28: Gligar
29: Gliscor
30: Tangela
31: Tangrowth
32: Dewpider
33: Araquanid
34: Joltik
35: Galvantula
36: Lotad
37: Lombre
38: Ludicolo
39: Litwick
40: Lampent
41: Chandelure
42: Skorupi
43: Drapion
44: Glameow
45: Purugly
46: Blitzle
47: Zebstrika
48: Solosis
49: Duosion
50: Reuniclus

 

[Adam Levine]

Oh boy. This'll be fun.

Spoiler:

1-2. Tentacool and Tentacruel. Not only does their exclusion make zero sense considering that Toedscool and Toedscruel are in the game, but Tentacruel itself is an unironically solid Pokémon. My Mono-Poison team really could've used a Water-type, and I just wasn't in the mood for Toxapex or Qwilfish.
3-5. Cleffa line. It's extremely strange that they got rid of literally every Pokémon with Magic Guard in this game. Not only would bringing the Cleffa line back make the Toedscool line's Mycelium Might less situational, but you're telling me that the game with an evil team named Team Star with a Fairy-type specialist doesn't have the Fairy-type Pokémon based on stars?
6-8. Grubbin line. i just love charjabug ok
9-10. Golett and Golurk. i just love golurk ok
11. Minior. This was the one Pokémon above all others that I was desperately hoping to be in the game. Why did Game Freak just get rid of all the Pokémon based on stars this generation (except Mareanie and Toxapex, who barely count)?
12-13. Heatmor and Durant. I just wanna use Heatmor, dang it. I'm glad they bothered to bring Zangoose and Seviper back, so I hope they give these two the same treatment soon.
14-15. Pancham and Pangoro. There's a bamboo forest in the game. This is literally my only rationale for adding them.
16. Miltank. It's seriously screwed up that this game doesn't have Miltank when it gave Tauros three forms.
17-18. Ferroseed and Ferrothorn. I just think they're neat.
19-20. Nosepass and Probopass. See above.
21-23. Budew line. Mostly the same reasons as the Tentacool line. I didn't feel like using Amoonguss as my Grass/Poison-type.
24-26. Zubat line. I just find it weird that this once cosmopolitan species is just nowhere to be found in Paldea.
27-28. Drilbur and Excadrill. Anything to keep Tyranitar back in OU.
29-30. Clobbopus and Grapploct. I would've added more Generation VIII Pokémon in this wishlist since I've never played SwSh, but strangely these are the only ones I feel like I actually miss.
31-33. Vanillite line, mainly to take full advantage of the fact that snow replaces hail.
34-37. Amaura and Aurorus for the same reasons as above, and Tyrunt and Tyrantrum, who're just along for the ride.
38. Castform. It'd be cool to see it in its different forms in the wild due to the overworld weather.
39. Kecleon. I think I'm just a sucker for Pokémon that would make for unique encounters in the overworld.
40. Mawile. Sableye's in the game already, so bringing Mawile back is a no-brainer.
41. Pinsir, for the same reason as Mawile.
42-43. Cottonee and Whimsicott. When making my Mono-Fairy I was disappointed by the selection of Fairies I had to work with, so bringing back a Fairy I'm actually fond of would do wonders for me.
44-46. Litwick line. Who says we can't have more than one Ghost-type candle Pokémon?
47. Dhelmise. I want my silly anchor back.
48-50. Swinub line. Eh, why not.

 

[Alex_Among_Foxes]

*Sigh* Here we go.

1 Absol (literally my favorite pokemon)
2/3 the Sandshrew line
4/5 the Vulpix line (I like foxes)
6-14 ALL of the Gen 2 starters
15/16 the Sentret line (they don't get enough love in my opinion)
17/18 the Chinchou line
19 Mawile
20/21 the Feebas line
22/23 the Woobat line
24/25 the Minccino line (no real reason beyond the fact that I think they're cute)
26 Zekrom (tied with Zygarde for my favorite legendary pokemon)
27-29 the Fennekin line (once again I like foxes)
30/31 the Espurr line (the same reason I want Minccino)
32/33 the Tyrunt line
34/35 the Amaura line
36 Zygarde (did anyone not see this coming after reading why I want Zekrom?)
37-39 the Rowlet line (I also like owls)
40/41 the Nickit line (I REALLY like foxes okay? sue me)
42/43 Reshiram & Kyurem I guess? (after I got my list I found out I was 2 short lol)
44-46 the Sword, Shield & Gun pokemon from SW/SH (their names are dumb but the pokemon are cool)
47-49 Jirachi, Victini & Meloetta ( my first, second & third favorite mythics)
50 Magearna ( it reminds me of Aigis, my favorite character from Persona 3, especially the 'Original' colored one)

 

[Devalue]

Begins with the (non-legendary) Pokemon not on the Switch yet.

1-3: Snivy line
4-6: Tepig line
7-8: Patrat line
9-14: Elemental monkeys
15-16: Blitzle line
17-19: Sewaddle line
20-21: Ducklett line
22: Furfrou
23-25: Pikipek line
26: Minior

Remembers needing more Rocks. Only sees Minior above. Looks for three lines of them.

27-28: Tyrunt line
29-30: Lileep line
31: Lunatone

What types have not been added in the above Pokemon? Dark, Ice, Fairy, Poison, Steel, and Ghost.

32: Absol
33-35: Spheal line
36-37: Cutiefly line
38-39: Koffing line
40: Togedemaru
41-42: Yamask line

Who else?

43-45: Weedle line. Never really popped up much in recent games. Was a version exclusive in BDSP and an Island Scan Pokemon in Ultra.
46: Duraludon.
47: Carnivine. BDSP only.
48-49: Snubbull line.
50: Dhelmise. Muscles in on Brambleghast's typing niche, but oh well. Wanted another Ghost. Only had one spot.