Sigh...
I trained my Seadra to Level 100 in Emerald because i thought it evolves into Kingdra by level-up. You couldn't believe how mad i was after i found out that i have to trade.
LOL...I hated it when you trained a Pokemon until it was Level 70+ or something, only to find out that there's a certain evolution method that the Pokemon needs or that it never learns the move you
thought it would learn via level-up. Poor Trainers who trained Feebas without knowing of the requirement...
As for me, IIRC, my first Pokemon at Level 100 was my Docile Blaziken nicknamed
Blazer! (I also like how Blaziken of Generation 3 games are recurring a few times in this thread :))
*bulbagarden.net image removed*
I know Kyogre and Rayquaza were among my first Pokemon at Level 100, followed by Swampert and Sceptile at some point. I had several Level 100s in two
Sapphire carts which I have lost, as well as my previous
Emerald save file which somehow strangely got corrupted. As soon as I can start my "permanent" files and get everything sorted out (i.e., schoolwork), then I will begin training all fully-evolved and non-evolving Pokemon to Level 100, including branched evolutions and all of the Formes of Pokemon who cannot freely change between Formes.
I have never had to motivation to level up my Pokemon to Lvl 100. So it's a no.
I didn't understand why people never had any motivation to train Pokemon to Level 100. I mean, you can cream people in Link Battles with them! (well, in Generation 3 you could...)
This is why they have the auto-level feature in the game. There's not much incentive to raise Pokemon to level 100 anymore. I've heard rumors that this was removed from BW, but I'm not familiar with this myself.
I really wish they took this annoying auto-level feature out. Nintendo should make Trainers
work to earn their Level 100 completion, as with it comes the ability of going toe-to-toe with other Trainers (for the most part), not to mention how it represents one's dedication to his or her Pokemon. With the auto-level feature in place, the concept of "levels" is almost rendered pointless outside of in-game gameplay.
I really don't see what the fuss is about training a Pokemon to Level 100, though...if you play for a few hours each day, within 3-5 days (in Gen 3 at least, sans Lucky Egg and with Exp. Share), a Pokemon can easily get to Level 100 with some Elite 4/Champion runs (then again, one has to be able to endure a high level of monotony). If the process on raising Pokemon was made to feel enjoyable and not as monotonous, I think people wouldn't mind the daunting training...