Stickied at last! Hopefully nobody's going to make any new threads.
Here's how the infinite works: when you are hit while in a grab, you become stunned and cannot leave the grab. You also cannot escape the grab while being attacked by the player grabbing you. Because the IC's are two people, this lets them take advantage of this fact. In short, with good timing, you have both Ice Climbers alternating hits so the opponent cannot leave the grab.
Here is the basic gist of it: grab the opponent with Popo, the main IC. Headbutt them (pressing A while in the grab) and then have Nana do a forward-tilt or down-tilt. Alternate the headbutts and the tilts evenly.
Here is a slightly more in-depth description on how to do it:
1) Grab.
2) Make sure Nana, your secondary IC, is close to you.
3) Hit A to have Popo headbutt; Nana will jab.
4) Gently slide the joystick either forward or down so that when you hit A next, Nana will tilt. Make sure she does the tilt before the headbutt ends.
5) As you continue sliding the joystick to its maximum, press A rhythmically. You want your attacks to be spaced apart as evenly as possible.
6) Keep pressing A with the joystick held in the direction you've chosen. You don't have to move the joystick any more after this. Just keep it held to do the tilt you've chosen.
7) When you are done, discard the opponent. I recommend waiting until Popo headbutts then hitting the c-stick down. Your down-smash will come out fastest and your opponent will have no forewarning that you're going to hit them; if there is anything to tech off of, they won't be able to. They also may DI poorly, but odds are you will continue hitting them until DI no longer matters.
An important note; you must wait for Nana's grab animation to end before headbutting with Popo and starting the infinite. If you don't, her tilts won't evenly alternate and you won't get an infinite.
There is another alternate way to set up the infinite, one that works reasonably well. However, I recommend not relying on it, as it takes a while to begin and the opponent can frequently escape before you begin the infinite portion. This is easier to do, but it also is not as fast as the method above. This was posted by Cyphus, although several people knew about it beforehand (but credit goes to him, since nobody else ever brought it up. Props, Cyphus).
1) After grabbing the opponent, hit A as you normally would.
2) Immediately after, hit down+b to have Nana blizzard. Keep holding down.
3) When the blizzard is about to end, hit A to have Popo headbutt. Then down-tilt with Nana, and repeatedly press A (with rhythm) to begin the infinite.
That's all for now. I will edit later and I will also be happy to answer questions about it; I would like it if other members of the community would chip in a bit though, so I don't have to do all the work myself. Thanks in advance.
Here's how the infinite works: when you are hit while in a grab, you become stunned and cannot leave the grab. You also cannot escape the grab while being attacked by the player grabbing you. Because the IC's are two people, this lets them take advantage of this fact. In short, with good timing, you have both Ice Climbers alternating hits so the opponent cannot leave the grab.
Here is the basic gist of it: grab the opponent with Popo, the main IC. Headbutt them (pressing A while in the grab) and then have Nana do a forward-tilt or down-tilt. Alternate the headbutts and the tilts evenly.
Here is a slightly more in-depth description on how to do it:
1) Grab.
2) Make sure Nana, your secondary IC, is close to you.
3) Hit A to have Popo headbutt; Nana will jab.
4) Gently slide the joystick either forward or down so that when you hit A next, Nana will tilt. Make sure she does the tilt before the headbutt ends.
5) As you continue sliding the joystick to its maximum, press A rhythmically. You want your attacks to be spaced apart as evenly as possible.
6) Keep pressing A with the joystick held in the direction you've chosen. You don't have to move the joystick any more after this. Just keep it held to do the tilt you've chosen.
7) When you are done, discard the opponent. I recommend waiting until Popo headbutts then hitting the c-stick down. Your down-smash will come out fastest and your opponent will have no forewarning that you're going to hit them; if there is anything to tech off of, they won't be able to. They also may DI poorly, but odds are you will continue hitting them until DI no longer matters.
An important note; you must wait for Nana's grab animation to end before headbutting with Popo and starting the infinite. If you don't, her tilts won't evenly alternate and you won't get an infinite.
There is another alternate way to set up the infinite, one that works reasonably well. However, I recommend not relying on it, as it takes a while to begin and the opponent can frequently escape before you begin the infinite portion. This is easier to do, but it also is not as fast as the method above. This was posted by Cyphus, although several people knew about it beforehand (but credit goes to him, since nobody else ever brought it up. Props, Cyphus).
1) After grabbing the opponent, hit A as you normally would.
2) Immediately after, hit down+b to have Nana blizzard. Keep holding down.
3) When the blizzard is about to end, hit A to have Popo headbutt. Then down-tilt with Nana, and repeatedly press A (with rhythm) to begin the infinite.
That's all for now. I will edit later and I will also be happy to answer questions about it; I would like it if other members of the community would chip in a bit though, so I don't have to do all the work myself. Thanks in advance.