Easy Challenge mode
In the Challenge mode (Time and Survival normal settings), you can use Zangief's special Tornado Spin to complete those levels very easily. There is one level on each mode that you cannot use the Tornado Spin. With those you can carefully time the hit and be able to take away a lot of strength and win those matches. The levels with Cammy and Blanca are the ones that are slightly more difficult to win, but are not impossible.