What Was your first Level 100?

Well, it'd be on Emerald...I'm guessing either Swampert, Salamence or Seasor the Seadra. Probably Seasor - its traded, so levels faster and I assumed all pokémon would evolve by lv. 100. Sadly I was wrong.

Empoleon from platinum.....I think....I dont know......

Mewtwo in Blue. Although it was so long ago that I might be completely wrong, but this is always the answer that I give when asked this question, so I'mma stick with it until something else pops up in my memory!

Now I think about it I never had any level 100 until' a Hoenn challenge with my friends back in the day. So yeah Mawile would be my first level 100.

Swampert in my first playthrough of Sapphire was my first level 100. Then I reset the game.

My first (and only) was Blaziken on Pokemon Sapphire. I went through the E4 and Champion with him :)

My first level 100 was the Mewtwo in Pokémon Blue. I later went on to bring my entire team to level 100.

My one and only legitimately hand-raised level 100 is my Typhlosion from Gold version. I guess I sort of used one Rare Candy when he was level 99, but yeppp, raised him myself. He knows Flamethrower, Fire Blast, Hyper Beam, and Cut. @_@ I'm fortunate that I traded him over to my Crystal since its save file works, while Gold was erased.

A Zorua, of course, in Pokemon Black.

Serperior in rising dark <3 Along with Lucario - I think that they leveled up one after another :3

I had already planned on raising a Rattata to level 100 before I even started playing Pokemon, and so my female Rattata I named Clover was my first, on my SoulSilver game. Took an eternity too. My male Haunter named Dark became my second level 100 shortly after, as I was going back and forth training the two. I made sure Clover was first though. :3 I plan to level up my Espeon to 100 eventually; right now she's in the 70s. My Serperior on Black is in the 80s, so she'll probably get there eventually too.

It was my Swampert back in Ruby that became my first ever level 100. Oh those were some good times man.

Blaziken in Emerald was my first for me. Then it was my Kyogre in emerald, then my crobat I transferred over from emerald to white, and now it's soon to be my entire white team (training them in white 2 tree hollow and black city tower. (I'm restarting white 2 every time I beat the tree hollow so all my teams will be 100 eventually)

Kadabra in Ruby. I was of the opinion that he would evolve someday... turns out a wasted good batch of training.

I thought I never got a Pokemon to a level 100, but I was just checking my old emulators and old saves, and apparently, 7 years ago, I got a Swampert to level 100.
So yeah, the only Pokemon I got on a level 100 would be Swampert. ^^

My first level 100 was Snorlax on Pokemon Silver. I used the BOX saving glitch to clone them and ended up with an army of lvl100 Snorlaxes.

Before wi-fi battling came a long, I never bothered training them up to 100, I usually finished the game with my whole team at level 70-80 or something. My first level 100 was Empoleon in Platinum.

My Empoleon, Frosty, from Pearl version back in 2007. He still lives on in my Platinum version and is the only Pokemon I will never erase.