Squid: Tentacruel, partially
Kangaroo: Besides Kangaskhan, Breloom
Quail: Natu
Kiwi: Doduo
Tentacruel is a jellyfish. Have you ever even SEEN a squid; their bodies are shaped like missiles, with eight medium tentacles and two massive ones that are shaped like plates at the end; Tentacruel is very wide and has many, many tentacles of equal length under it, like a jellyfish.
Breloom does have the body shape, but I was hoping for something a little more mammalian.
Natu? Quails aren't circular, they are shaped a lot like chickens; the only similarity I see between Natu and a quail (besides being a bird) is that Natu has a little feather on top of its head. Even then, it's nothing like the projections on top of quails' heads; on real quails, they are shaped like question marks.
Okay, you got me with the kiwi; score one for you.
More ideas I came up with:
Giant Panda with bamboo swords (deadly, but too adorable to attack)
Emu (no, not emo, we already got one of those in the 5th gen)
Swordfish
Electric Eel (I know I said eel earlier, but at the time I was thinking of a moray)
Pistol Shrimp