I say Magikarp. You would capture that blank stare and gaping mouth. I'm bias though. My fiance likes to tackle me and nom on my face and talk like magikarp. flopping on my body while calling out "Karp! Karp! Magikarp! I think it would please us both and be a WIN for life.
I noticed almost all of these are voting for Entei or the other two. Glorified PokeDogs are kind of overdone... They don't really need anymore attention. Do something different, like a simple common pokemon. Like Ariados or Zangoose or something.
Nidoking isn't easy like entei, entei is set up for this. But Nidoking would be a mass of spikes and grarl, it would be really interesting to see one of the bulky dinosaur type-o pokemon in your fu style. they have a lot of room for interpretation too. (aggron, tyranitar, nidoking etc)
For your 'Fu' style I'd definitely have to say one of the Legendaries like Entei, Raikou, or Suicine. Also Arcanine would look cool, too, but I'd like to see something a little different. Arcanine would be kinda...predictable? At least, I would think so anyway.
Fu aside, I'd like to see your take on Rayquaza or Kyogre. Also, Sceptile...but that's 'cause he's a personal favorite.
Absool or Raikou, yeah Raikou definitely ... or Suicune but Suicune is overrated. perhaps Ho-Oh though, thatd look damn awesome too! ...Misdreavus or Mismagius maybe,.. sceptile or grovile maybe.. and Duskull maybe.