Your first level 100 Pokemon

[RikSharp]

dragonite in blue.
the champion used one so i figured they was good.

have had loads since then, although nowadays, i prefer breeding them to get unusual movesets for my friends

 

[AgesMcCoor]

Venasaur in pokemon blue
such a good game!!!

 

[Troublesome Lagomorph]

Typhlosion in silver.
I used that typhlosion until the game decided to erase my saves.

 

[Cody211282]

Never had one, mostly because to beat the game you don't need one.

 

[Haro]

Tombo the Blastoise was my first 100. There were many more.

 

[kelwina]

Typhlosion back in the original gold version

 

[geddydisciple]

Charizard was my first. He was so tough he could beat the elite four by himself and he would barely have a scratch on him. I miss my Charizard

 

[Woodscare]

My first level 100 was my Snorlax but i did cheat and use the rare candy cheat. My first proper 100 (which took forever) was my Venusaur.

I know how you feel, thats why I never made another level 100 pokemon again. I also hated using rare candies

 

[Maquette]

Mine was Meowth on Pokémon Blue.

Meowth, that's right! 8D

 

[SamuelT]

Golduck. 'Cause I wanted to know if it could use hyperbeam, like in the animé.

Never learned it.

 

[KimberlyGoreHound]

Pikachu in Pokémon Yellow, because I'm boring and uncreative.
Second was Charizard, in the same game.
Then Blastoise, on the same file.
Fourth was Mewtwo.
Fifth was Articuno.
Sixth was Zapdos.

Those are the only ones who ever hit 100 legitimately. Best save file I ever made. Except I failed to catch 'em all.

 

[CounterAttack]

I've never gotten anyone to level 100. I find it to be an inefficient use of experience.

 

[Haunted Serenity]

Magneton in Gold.
I also got Ninetales and Onix. God those three were invinceble.

 

[chromewarriorXIII]

It was my Feralitgatr in Crystal version. I still have it too.

 

[shemoanscazrex3]

Charizard? I think. I know back in the old days I used a lot of Gameshark

 

[Joachim Aachen]

Typhlosion!
GO CRYSTAL VERSION. |'D
Then came a Golduck, and those were the only two. ):

 

[KaiRai]

I believe mine was Ampharos (Didn't actually start playing till Gold), second was Meganium (I think that's right? Chikorita's final evolution) and my 3rd was Raikou, cause master balls rock

 

[Woodscare]

Typhlosion!
GO CRYSTAL VERSION. |'D
Then came a Golduck, and those were the only two. ):

I loved Crystal version

 

[HotShooter]

Charizard in Red.
I usually just level up my starter and the best legendary in the game, and the rest are for the HM

 

[Phenakist]

I believe it was my Flygon... No, wait, was Charizard on my first playthrough ever when I was 9 and I assumed you got a prize of sorts by getting something to level 100... Good times.