Two interesting questions on word games

====No. 1====
I remember there is a kind of word game like the following:
1) two words put together, both beginning with consonants
2) change the initial consonants, and two new words are created
3) it is said to be originated by slip of tongue.

Unluckily I have forgotten its name. who can tell me? Thank you!

====No.2====
Long before in a certain article I found a sentence which is claimed to contain all the sounds (not letters) of the English language. But I can hardly think of it. Who happenes to know it?

Thank you a million!