Kingdra because that was to be part of my team...until Silver's battery died on me.
Milotic's my personal favorite Water-type. Mainly cause like, they totally benefit from the Sp Attack boost they get (For evolving easier, and having a kickass Sp Attack like it should) and their fairly nice movepool and stats Milotic get. Pain in the ass to get one though, and even harder to get a shiny.
Thanks to my Best Friend Kieko4eva for the banner.
so, i herd i liek mudkipz
My Pokemon favorites:
IMO, Dialga is the coolest Pokemon, and Mew is the cutest. My favorite human characters are Brendan, May, and Marina (From Battle Revolution). I also like Rui, Cynthia, and Dawn. I like games, PokeSpecial manga, and shipping. I support HoennShipping, ColosseumShipping, RangerShipping, SpecialShipping and a whole lot of others. I have named over 130 ships.
If it can be a Water duel type (seeing a lot of people said Swampert is their favorite) Then my choice would be LM4. (Water/Fighting) It goes over level 100, and it learns entertaining glitch moves. Plus I like its evolutions.
But, if you meant actual Pokémon, then I'd say Buizel, 'cause it's so cute! ^^