Following in the footsteps of Slowpoke Rodriguez and continuing the trend of cartoon characters perpetuating negative ethnic stereotypes, we have Ludicolo.
Just look at him. So jolly and happy, just wanting to boogie down. It makes me sick
With dance fever. Cue the water-type-tight court cases!
Ludicolo is always going to be in my top 5 'mons. I love
wacky, wild-card characters, and this guy fits the bill perfectly, which is great considering he has one. His ecstatic attitude is one that happens to be oddly infectious, and combined with his bizarre appearence, I always end up smiling whenever I see this character. Only the guys at gamefreak could somehow connect the dots from lilypad, to kappa, to mariachi maestro and manage to make it work so seamlessly. There are many 'mons whose character designs I often find myself wishing I could have come up with, but this is the one that always seems to bring that thought forward most often. 'I wish I could have created this character'.
Also, though I'm not much of a competitive battler, Ludicolo has always served me well on the videogame side of things. While known for his unique rain dish/substitute/leech seed combo, since his introduction to the series, it's always been the simple swift swim variant that I've been particularly fond of. Though whichever strategy you opt for, he's always going to be dancing around happily, as if seemingly taunting your opponent as the last of their hp is sapped away.