Good wi-fi co-op games?

Recently I started playing wi-fi enabled multiplayer games with one of my friend with the ds.. but we're getting bored of it and we want some with a wi-fi co-op.. any recommendation? {Best with chat service} Any games with a wi-fi coop function would do ...We are currently playing these wi-fi games:
- Metroid Prime Hunters
- Clubhouse Games
- Cookies and Creams
- Animal Crossing
- Phantasy Star Zero

Final Fantasy crystal chronicles echoes of time

That has a horrible chat system.Pokemon? You can use Pokesav to just make LEGIT but good pokemon and fight?Teheezin, Which of those has the best chat system?

Phantasy Star Zero and Clubhouse Games?

Ye? Do you talk in clubhouse games?

Yep..

New Super Mario Bros Wii isn't Wi-Fi enabled but it is a good co-op game.
Only if you like the Mario World series.

he was referring to DS

Yea DS T.T

Dang it. Ummmm Kirby games. (Kirby Super Star Ultra)

i have to agree with frebels. final fantasy chronicles echoes of time. i've been playing with my friends for a bit now. i know mario-kart is not a co-op game but it's cool on wi-fi. and last Kirby Super Star Ultra is a great co-op game but it's not wi-fi it's DS wireless connection.

3Strangers Thats not wifi enabled

Clubhous Games is cool ...but the problem is , NOONE IS PLAYING IT ONLINE.I never saw 1 person online when i played it.Got pretty boring because of this