How many championships has Kyle Busch won, and in which series?

May be...

Zip. Nada, Zilch. 0, none, cero, nunca!

No one championship in the NASCAR series.

Hopefully that will stay like that for another year.

that would be a big goose egg. 0, Zero, Zlich, Nada, None. and I hope grows up a little before he wins one.

None

In NASCAR? None. But, from 1999 through 2001, Busch earned more than 65 wins in legends cars as he racked up two track championships at Las Vegas Motor Speedway’s “Bullring” before moving to late models.
http://en.wikipedia.org/wiki/Kyle_Busch

*MOJO*

no nascar series championships - yet. but he was rookie of the year in the then-busch series in 2004, winning five races in the process and setting the record for most wins for a rookie while finishing second in the points. he more than likely would have been a shoe-in for the 2005 busch series championship but was moved up full-time into cup and only ran 14 busch series races. at the same time in 2005 he won rookie of the year in the cup series, collecting two wins in the process. the only "championships" i know of are track championships, at least two of them at the bullring in vegas:

From 1999 through 2001, Busch earned more than 65 wins in legends cars as he racked up two track championships at Las Vegas Motor Speedway’s “Bullring” before moving to late models.

Zero.

1 less than he will have this time next year ;)

None in NASCAR, but I heard he came in second place in a Pee-Wee Herman lookalike contest!

he has won nothing this will be his first but watch out for edwards he is not to far behind him

he's like 7-up never had it never will. Just kidding I really do think he's the one to beat this year. The only one to beat him will be Kyle himself, let's hope he doesn't self destruct

NASCAR Sprint Cup Series: 0
NASCAR Nationwide Series: 0
NASCAR Craftsman Truck Series: 0
NASCAR Regional Series: 0

0 in each and every series.

at least jr. has won 2 busch series championships.

then again, if stats mean anything, he'll have 1 by the end of this year.

He hasn't won any yet.

I cannot tell a lie, none.

None...

Zilch / notta

a big "0" none yet..

Go Dale Jr & Hms

None

LOL @ fluffy's answer

I'm going to say something nice for the little Busch
(I owe him one)
Kyle Busch has won a few Championships
in the series of Love
with his girlfriend

0