How do you counter a team that has Twitch, Udyr, Yi, Poppy, and Kayle? I know early game it's not too hard to keep them in check, but if they play smart, they don't die. So mid game comes when the ultis are available, and they become almost unstoppable in team fights. What do you do? Also, the Yi and Twitch have Cleanse.

I've never played a team like this, but I'm thinking it would be very annoying.

How about singed, sivir, trist, Alistar, Anivia?
3 ranged to stop udyr from easymode laning. You can harass him.
Singed poison owns poppy. Every one, can stand up to poppy head to head pretty well.
Multiple knockups/backs, stuns to shut down any kayle/poppy/yi attempts to go nuts on you.
Wall to own yi, poppy, udyr as well.

sure that's an "OP" team individually. but they don't necessarily beat a well organized team.

focus fire kayle, once she blows her ulti she is basically useless

also the team only has 1 stun (udyr) no CC at all to speak, no real tank, udyr can be a secondary tank but he isnt a true tank..a well coordinated team who work together should have no probs, esp if you have some CC

if you can get a gank off on kayle then push together, the only one you really would have to worry about is twitch with his ulti

the rest should be scared to go up against you without their lifeline

blitzcrank would do you wonders.

Rammus + Alistar.

AoE stun and uncleansable (or is it cleansable now) CC ftw.

Also, it is a pure physical team, so a little Armor would go a long way. The Rammus mentioned above would screw them up.

They may be good heroes, but with the exception of Kayle they have no synergy together. A well constructed team will win every team fight.

Really, just ignore Kayle, she's going to ult someone, kill the others in the meantime.