... legitimately or through cheats? In Blue, I did have several 100 level pokemon thanks to the rare candy/item cheat. Thank you Missing No.! The first one I belive was Starmie.
Legitimately was my Empoleon because of E4 runs. I skipped gen 3 and never really cared about it execpt for emerald. I think my Septile will get that honor of being the first 100 on that gen.
The Dewgong, Cezanne, that I traded a level 34 Growlithe for in my Yellow.
Then came the Feraligatr I started with in my Gold (deleted due to dead save battery)
Then came those six Pokémon in my Ruby/Colosseum files (Umbreon, Espeon, Hariyama, Plusle all from Colosseum; Swampert and Skarmory from Ruby (yes I started with a Mudkip in my Ruby)) all at level 100 when that data also got deleted.
Then along came my Pearl. The first Level 100 in my Pearl is Pikachu; Espeon came second. Then came the Arcanine and Latias I got from my friend Moses (they were at or near 100 when I got them) and an EV-trained Choice Specs Starmie that I currently own and wish to trade to a competitive battler (on YouTube) for an extra Gamestop Deoxys of theirs.
Pikachu is my favorite Pokémon.
Credit goes to PlatinumDude for the sprite.
Originally Posted by Spock
Pokemon Gold. It was an Eevee, which I trained daily and gave all of my time on Pokemon too. After I raised it to the substantial level of 30 (from level 5), I then decided to think about evolution. However, I liked having an eevee too much, and decided not to evolve it. A few days later (I like training), It finally grew to level 100, before my Cyndaquil, which I raised secondly.
A Swellow named "Tsubasa" from my Emerald game, which I had moved over to Pearl after I got access to Pal Park. It's the Pokémon that fronts my party when I chain for shiny Pokémon, so it gradually ended up being leveled all the way to 100.