<s>
is	O
a	O
kart	O
racing	O
game	O
developed	O
and	O
published	O
by	O
Nintendo	O
for	O
the	B-Operating_System
Wii	I-Operating_System
.	O
</s>
<s>
It	O
is	O
the	O
sixth	O
installment	O
in	O
the	O
Mario	B-Application
Kart	I-Application
series	O
,	O
and	O
was	O
released	O
in	O
April	O
2008	O
.	O
</s>
<s>
Like	O
its	O
previous	O
installments	O
,	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
incorporates	O
playable	O
characters	O
from	O
the	O
Mario	B-Application
series	I-Application
,	O
who	O
participate	O
in	O
races	O
on	O
32	O
different	O
race	O
tracks	O
using	O
specialized	O
items	O
to	O
hinder	O
opponents	O
or	O
gain	O
advantages	O
.	O
</s>
<s>
Online	O
multiplayer	O
was	O
supported	O
until	O
the	O
discontinuation	O
of	O
Nintendo	B-Application
Wi-Fi	I-Application
Connection	I-Application
in	O
May	O
2014	O
.	O
</s>
<s>
Mario	B-Application
Kart	I-Application
Wii	I-Application
uses	O
the	B-Operating_System
Wii	I-Operating_System
Remote	O
motion-controls	B-Device
to	O
provide	O
intuitive	O
and	O
conventional	O
steering	O
controls	O
.	O
</s>
<s>
Each	O
copy	O
of	O
the	O
game	O
was	O
bundled	O
with	O
the	B-Operating_System
Wii	I-Operating_System
Wheel	O
accessory	O
to	O
augment	O
this	O
feature	O
and	O
mimic	O
a	O
steering	O
wheel	O
.	O
</s>
<s>
The	O
game	O
sold	O
over	O
37	O
million	O
copies	O
,	O
making	O
it	O
the	O
second	O
best-selling	O
Mario	B-Application
Kart	I-Application
game	O
after	O
Mario	B-Device
Kart	I-Device
8	I-Device
Deluxe	I-Device
and	O
one	O
of	O
the	O
best-selling	B-Application
video	I-Application
games	I-Application
of	I-Application
all	I-Application
time	I-Application
.	O
</s>
<s>
Mario	B-Application
Kart	I-Application
Wii	I-Application
is	O
a	O
kart	O
racing	O
game	O
featuring	O
single-player	O
and	O
multiplayer	O
modes	O
.	O
</s>
<s>
The	O
players	O
control	O
one	O
of	O
many	O
selectable	O
Mario	B-Application
franchise	I-Application
characters	O
and	O
participate	O
in	O
races	O
or	O
battles	O
using	O
go-karts	O
or	O
bikes	O
on	O
courses	O
thematically	O
based	O
on	O
locations	O
from	O
the	O
Mario	B-Application
franchise	I-Application
.	O
</s>
<s>
Mario	B-Application
Kart	I-Application
Wii	I-Application
supports	O
four	O
different	O
control	O
schemes	O
.	O
</s>
<s>
The	O
primary	O
control	O
scheme	O
is	O
the	B-Operating_System
Wii	I-Operating_System
Remote	O
,	O
optionally	O
used	O
in	O
conjunction	O
with	O
the	O
plastic	O
Wii	B-Operating_System
Wheel	O
accessory	O
,	O
which	O
uses	O
the	O
controller	O
's	O
motion-controls	B-Device
to	O
simulate	O
operating	O
a	O
steering	O
wheel	O
.	O
</s>
<s>
The	O
other	O
supported	O
control	O
schemes	O
are	O
the	B-Operating_System
Wii	I-Operating_System
Remote	O
with	O
the	O
Nunchuk	O
attachment	O
;	O
the	O
Classic	O
Controller	O
;	O
and	O
the	O
GameCube	B-Device
controller	I-Device
.	O
</s>
<s>
These	O
include	O
the	O
series	O
staple	O
items	O
,	O
such	O
as	O
the	O
Mushroom	O
,	O
Koopa	O
Shell	O
projectiles	O
,	O
the	O
Super	O
Star	O
,	O
banana	O
peels	O
and	O
lightning	O
bolts	O
,	O
as	O
well	O
as	O
new	O
items	O
such	O
as	O
the	O
Mega	B-Application
Mushroom	I-Application
and	O
POW	B-Application
Block	I-Application
.	O
</s>
<s>
Mario	B-Application
Kart	I-Application
Wii	I-Application
features	O
twenty-four	O
playable	O
characters	O
from	O
the	O
Mario	B-Application
series	I-Application
,	O
the	O
largest	O
roster	O
of	O
any	O
Mario	B-Application
Kart	I-Application
game	O
until	O
the	O
release	O
of	O
Mario	B-Application
Kart	I-Application
8	I-Application
in	O
2014	O
.	O
</s>
<s>
The	O
game	O
features	O
characters	O
who	O
have	O
appeared	O
in	O
previous	O
installments	O
,	O
including	O
Mario	B-Application
,	O
Luigi	O
,	O
Princess	O
Peach	O
,	O
Yoshi	B-Application
,	O
Toad	O
,	O
Donkey	O
Kong	O
,	O
and	O
Bowser	O
,	O
in	O
addition	O
to	O
characters	O
such	O
as	O
Rosalina	O
and	O
Dry	O
Bowser	O
who	O
are	O
playable	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
Unlike	O
Mario	B-Application
Kart	I-Application
DS	I-Application
,	O
where	O
characters	O
can	O
drive	O
a	O
kart	O
exclusive	O
to	O
that	O
character	O
and	O
the	O
standard	O
go-kart	O
,	O
each	O
character	O
is	O
assigned	O
to	O
one	O
of	O
three	O
different	O
weight	O
classes	O
,	O
which	O
affects	O
the	O
selection	O
of	O
vehicles	O
the	O
character	O
can	O
drive	O
.	O
</s>
<s>
In	O
addition	O
to	O
this	O
,	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
introduced	O
two	O
different	O
classes	O
of	O
vehicles	O
,	O
Karts	O
and	O
Bikes	O
,	O
with	O
the	O
latter	O
being	O
a	O
new	O
addition	O
to	O
the	O
series	O
.	O
</s>
<s>
Thirty-six	O
vehicles	O
,	O
are	O
available	O
in	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
,	O
each	O
of	O
which	O
has	O
different	O
properties	O
that	O
affect	O
how	O
the	O
vehicle	O
handles	O
while	O
driving	O
.	O
</s>
<s>
Half	O
of	O
the	O
courses	O
are	O
new	O
,	O
while	O
the	O
other	O
half	O
are	O
remakes	O
of	O
courses	O
from	O
prior	O
Mario	B-Application
Kart	I-Application
games	O
.	O
</s>
<s>
Mario	B-Application
Kart	I-Application
Wii	I-Application
features	O
multiple	O
game	O
modes	O
:	O
Grand	O
Prix	O
,	O
Time	O
Trials	O
,	O
Versus	O
,	O
and	O
Battle	O
.	O
</s>
<s>
All	O
modes	O
support	O
single-player	O
gameplay	O
;	O
Versus	O
and	O
Battle	O
support	O
local	O
multiplayer	O
for	O
up	O
to	O
four	O
players	O
,	O
with	O
or	O
without	O
computer-controlled	B-Application
players	I-Application
.	O
</s>
<s>
Ghost	O
data	O
can	O
be	O
saved	O
in	O
the	B-Operating_System
Wii	I-Operating_System
console	O
memory	O
.	O
</s>
<s>
Battle	O
mode	O
is	O
similar	O
to	O
that	O
seen	O
in	O
previous	O
installments	O
in	O
which	O
players	O
drive	O
around	O
an	O
enclosed	O
arena	B-Application
and	O
attack	O
each	O
other	O
using	O
items	O
.	O
</s>
<s>
In	O
Coin	O
Runners	O
,	O
the	O
players	O
collect	O
coins	O
scattered	O
throughout	O
the	O
arena	B-Application
and	O
attack	O
opposing	O
team	O
members	O
to	O
make	O
them	O
drop	O
coins	O
.	O
</s>
<s>
There	O
are	O
ten	O
arena	B-Application
courses	O
available	O
for	O
Battle	O
mode	O
,	O
which	O
include	O
five	O
original	O
courses	O
and	O
five	O
retro	O
courses	O
.	O
</s>
<s>
Online	B-Application
play	I-Application
via	O
Nintendo	B-Application
Wi-Fi	I-Application
Connection	I-Application
was	O
available	O
until	O
its	O
discontinuation	O
on	O
May	O
20	O
,	O
2014	O
.	O
</s>
<s>
Versus	O
and	O
Battle	O
modes	O
were	O
available	O
and	O
supported	O
up	O
to	O
twelve	O
participants	O
,	O
and	O
up	O
to	O
two	O
players	O
could	O
connect	O
and	O
play	O
from	O
the	O
same	O
Wii	B-Operating_System
console	I-Operating_System
.	O
</s>
<s>
The	O
Mario	B-Application
Kart	I-Application
Channel	O
also	O
offered	O
additional	O
online	O
information	O
,	O
including	O
regional	O
or	O
worldwide	O
rankings	O
for	O
Time	O
Trials	O
,	O
and	O
monthly	O
Nintendo	O
sponsored	O
tournaments	O
with	O
special	O
objectives	O
.	O
</s>
<s>
Mario	B-Application
Kart	I-Application
Wii	I-Application
is	O
the	O
sixth	O
game	O
in	O
the	O
Mario	B-Application
Kart	I-Application
series	O
,	O
following	O
Mario	B-Application
Kart	I-Application
DS	I-Application
.	O
</s>
<s>
Hideki	O
Konno	O
,	O
who	O
worked	O
with	O
the	O
Software	O
Development	O
Department	O
of	O
Nintendo	O
's	O
Entertainment	O
Analysis	O
&	O
Development	O
(	O
EAD	O
)	O
division	O
and	O
had	O
previously	O
worked	O
on	O
the	O
first	O
two	O
Mario	B-Application
Kart	I-Application
games	O
as	O
well	O
as	O
Mario	B-Application
Kart	I-Application
DS	I-Application
,	O
served	O
as	O
the	O
game	O
's	O
producer	O
.	O
</s>
<s>
Features	O
for	O
cut	O
from	O
Mario	B-Application
Kart	I-Application
DS	I-Application
due	O
to	O
time	O
constraints	O
were	O
implemented	O
in	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
.	O
</s>
<s>
The	O
game	O
was	O
the	O
first	O
in	O
the	O
series	O
to	O
feature	O
BMX	O
motorbikes	O
as	O
drivable	O
vehicles	O
,	O
an	O
idea	O
which	O
Konno	O
had	O
proposed	O
since	O
Double	B-Application
Dash	I-Application
out	O
of	O
his	O
passion	O
for	O
extreme	O
sports	O
but	O
was	O
rejected	O
due	O
to	O
the	O
seemingly	O
bizarre	O
image	O
of	O
Mario	B-Application
riding	O
a	O
bike	O
.	O
</s>
<s>
The	O
game	O
was	O
briefly	O
known	O
internally	O
under	O
the	O
name	O
"	O
Mario	B-Application
Kart	I-Application
X	O
"	O
before	O
its	O
final	O
name	O
was	O
decided	O
upon	O
,	O
referring	O
to	O
the	O
"	O
X	O
"	O
in	O
the	O
word	O
"	O
extreme	O
"	O
.	O
</s>
<s>
Mario	B-Application
Kart	I-Application
Wii	I-Application
was	O
officially	O
announced	O
at	O
E3	O
2007	O
;	O
the	O
online	O
features	O
and	O
the	O
first	O
footage	O
of	O
the	O
game	O
were	O
shown	O
at	O
the	O
Expo	O
.	O
</s>
<s>
Additional	O
details	O
of	O
the	O
game	O
were	O
later	O
released	O
in	O
conjunction	O
with	O
the	O
Nintendo	O
Fall	O
2007	O
Conference	O
held	O
in	O
October	O
2007	O
,	O
where	O
it	O
was	O
revealed	O
that	O
it	O
would	O
include	O
bikes	O
and	O
the	B-Operating_System
Wii	I-Operating_System
Wheel	O
.	O
</s>
<s>
To	O
complement	O
Mario	O
Kart	O
Wii'''s	O
unique	O
motion	B-Device
controls	I-Device
,	O
a	O
wheel-shaped	O
plastic	O
casing	O
for	O
the	B-Operating_System
Wii	I-Operating_System
Remote	O
was	O
included	O
with	O
some	O
versions	O
of	O
the	O
game	O
.	O
</s>
<s>
The	O
designers	O
tested	O
roughly	O
30	O
different	O
prototypes	B-Application
of	O
the	O
wheel	O
with	O
different	O
shapes	O
,	O
colors	O
,	O
and	O
weights	O
based	O
on	O
real-life	O
go-karts	O
.	O
</s>
<s>
The	O
final	O
design	O
for	O
the	O
wheel	O
was	O
made	O
to	O
be	O
as	O
lightweight	O
as	O
possible	O
for	O
it	O
to	O
suit	O
long-term	O
periods	O
of	O
gameplay	O
,	O
and	O
it	O
was	O
made	O
entirely	O
white	O
despite	O
experimentation	O
with	O
two-colored	O
designs	O
for	O
it	O
to	O
fit	O
with	O
the	O
color	O
scheme	O
of	O
previous	O
peripherals	O
such	O
as	O
the	B-Operating_System
Wii	I-Operating_System
Zapper	O
and	O
the	B-Operating_System
Wii	I-Operating_System
Balance	O
Board	O
.	O
</s>
<s>
A	O
blue	O
ring	O
with	O
the	B-Operating_System
Wii	I-Operating_System
logo	O
inside	O
of	O
it	O
was	O
also	O
placed	O
on	O
the	O
backside	O
of	O
the	O
wheel	O
to	O
give	O
spectating	O
players	O
something	O
interesting	O
to	O
look	O
at	O
;	O
as	O
a	O
result	O
,	O
this	O
blue	O
ring	O
ended	O
up	O
being	O
featured	O
in	O
the	O
game	O
's	O
logo	O
.	O
</s>
<s>
The	O
speaker	O
on	O
the	B-Operating_System
Wii	I-Operating_System
Remote	O
is	O
frequently	O
used	O
during	O
gameplay	O
,	O
with	O
sound	O
effects	O
being	O
emitted	O
from	O
it	O
.	O
</s>
<s>
During	O
the	O
extensive	O
testing	O
of	O
the	O
different	O
Wii	B-Operating_System
Wheel	O
prototypes	B-Application
,	O
the	O
developers	O
decided	O
to	O
have	O
the	O
voice	O
actors	O
play	O
the	O
game	O
during	O
recording	O
sessions	O
.	O
</s>
<s>
ReceptionMario	O
Kart	O
Wii	B-Operating_System
received	O
"	O
generally	O
favorable	O
"	O
reviews	O
according	O
to	O
Metacritic	O
.	O
</s>
<s>
Reviewers	O
deemed	O
the	O
gameplay	O
to	O
be	O
familiar	O
and	O
more	O
safe	O
and	O
predictable	O
than	O
that	O
of	O
Mario	B-Application
Kart	I-Application
:	I-Application
Double	I-Application
Dash	I-Application
.	O
</s>
<s>
Official	O
Nintendo	O
Magazine	O
commented	O
that	O
the	B-Operating_System
Wii	I-Operating_System
Wheel	O
worked	O
very	O
effectively	O
and	O
loved	O
the	O
different	O
multiplayer	O
modes	O
.	O
</s>
<s>
In	O
2010	O
,	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
was	O
included	O
in	O
the	O
book	O
1001	O
Video	O
Games	O
You	O
Must	O
Play	O
Before	O
You	O
Die	O
.	O
</s>
<s>
Anthony	O
John	O
Agnello	O
and	O
David	O
Roberts	O
of	O
GamesRadar+	O
ranked	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
#11	O
in	O
their	O
2017	O
list	O
of	O
best	O
Mario	B-Application
Kart	I-Application
games	O
,	O
the	O
second-lowest	O
ranking	O
behind	O
the	O
cancelled	O
Virtual	B-Device
Boy	I-Device
Mario	B-Application
Kart	I-Application
.	O
</s>
<s>
They	O
described	O
the	O
game	O
as	O
"	O
a	O
bloated	O
,	O
populist	O
mess	O
attempting	O
to	O
please	O
everyone	O
"	O
that	O
"	O
feels	O
like	O
the	O
most	O
Mario	B-Application
Kart	I-Application
rather	O
than	O
the	O
best	O
Mario	B-Application
Kart	I-Application
,	O
and	O
as	O
a	O
result	O
,	O
it	O
's	O
as	O
if	O
it	O
's	O
missing	O
the	O
series	O
 '	O
soul	O
"	O
.	O
</s>
<s>
Luke	O
Plunkett	O
of	O
Kotaku	O
ranked	O
the	O
game	O
at	O
#7	O
out	O
of	O
the	O
nine	O
best	O
Mario	B-Application
Kart	I-Application
games	O
;	O
he	O
felt	O
that	O
there	O
was	O
little	O
reason	O
to	O
play	O
the	O
game	O
after	O
the	O
improvements	O
made	O
by	O
Mario	B-Application
Kart	I-Application
7	I-Application
and	O
8	B-Application
,	O
and	O
that	O
the	O
motion	B-Device
controls	I-Device
were	O
"	O
straight	O
garbage	O
"	O
.	O
</s>
<s>
While	O
official	O
online	B-Application
play	I-Application
support	O
ended	O
in	O
2014	O
,	O
unofficial	O
video	O
game	O
mods	O
created	O
by	O
fans	O
has	O
re-established	O
online	B-Application
play	I-Application
,	O
and	O
even	O
added	O
new	O
features	O
,	O
such	O
as	O
24	O
player	O
races	O
.	O
</s>
<s>
SalesMario	O
Kart	O
Wii	B-Operating_System
had	O
a	O
successful	O
launch	O
and	O
sold	O
300,000	O
copies	O
on	O
the	O
launch	O
day	O
in	O
Japan	O
alone	O
,	O
compared	O
to	O
Mario	B-Application
Kart	I-Application
DS	I-Application
which	O
sold	O
160,000	O
copies	O
on	O
its	O
first	O
day	O
and	O
Mario	B-Application
Kart	I-Application
:	I-Application
Double	I-Application
Dash	I-Application
which	O
sold	O
180,000	O
on	O
its	O
first	O
day	O
.	O
</s>
<s>
In	O
the	O
week	O
ending	O
May	O
4	O
,	O
2008	O
,	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
had	O
sold	O
over	O
a	O
million	O
copies	O
in	O
Japan	O
alone	O
,	O
less	O
than	O
a	O
month	O
since	O
its	O
release	O
in	O
the	O
region	O
.	O
</s>
<s>
In	O
the	O
UK	O
,	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
was	O
the	O
best-selling	B-Application
video	I-Application
game	I-Application
in	O
the	O
week	O
ending	O
April	O
12	O
,	O
2008	O
,	O
having	O
"	O
the	O
eighth	O
biggest	O
opening	O
sales	O
week	O
in	O
UK	O
software	O
history	O
,	O
"	O
according	O
to	O
GfK	O
Chart-Track/ELSPA	O
.	O
</s>
<s>
The	O
game	O
dwarfed	O
all	O
other	O
five	O
Mario	B-Application
Wii	B-Operating_System
games	O
released	O
up	O
until	O
then	O
for	O
the	B-Operating_System
Wii	I-Operating_System
combined	O
when	O
comparing	O
first	O
week	O
sales	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
,	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
was	O
the	O
second-best-selling	O
video	O
game	O
in	O
April	O
2008	O
,	O
selling	O
1.12	O
million	O
copies	O
,	O
according	O
to	O
the	O
NPD	O
Group	O
;	O
putting	O
it	O
behind	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
version	O
of	O
Grand	B-Application
Theft	I-Application
Auto	I-Application
IV	I-Application
and	O
ahead	O
of	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
version	O
,	O
both	O
released	O
in	O
the	O
same	O
week	O
.	O
</s>
<s>
As	O
of	O
March	O
2009	O
,	O
Nintendo	O
has	O
sold	O
15.4	O
million	O
copies	O
of	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
worldwide	O
.	O
</s>
<s>
In	O
France	O
,	O
it	O
sold	O
4.8	O
million	O
units	O
,	O
which	O
is	O
more	O
than	O
it	O
sold	O
in	O
Japan	O
(	O
3.7	O
million	O
)	O
.	O
</s>
<s>
With	O
37.38	O
million	O
copies	O
sold	O
worldwide	O
as	O
of	O
March	O
31	O
,	O
2021	O
,	O
the	O
game	O
is	O
the	O
best-selling	O
Mario	B-Application
game	O
for	O
the	B-Operating_System
Wii	I-Operating_System
,	O
the	O
2nd	B-Application
best-selling	I-Application
racing	O
game	O
,	O
and	O
the	O
2nd	B-Device
best-selling	I-Device
game	I-Device
for	I-Device
the	I-Device
Wii	I-Device
behind	O
Wii	B-Application
Sports	I-Application
.	O
</s>
<s>
The	O
game	O
won	O
multiple	O
Wii-specific	O
awards	O
from	O
IGN	O
in	O
its	O
2008	O
video	O
game	O
awards	O
,	O
including	O
Best	O
Racing	O
Game	O
and	O
Best	O
Online	O
Multiplayer	O
Game	O
.	O
</s>
<s>
IGN	O
also	O
nominated	O
it	O
for	O
Best	O
Family	O
Game	O
for	O
the	B-Operating_System
Wii	I-Operating_System
.	O
</s>
<s>
The	O
game	O
was	O
ranked	O
ninth	O
in	O
Nintendo	B-Application
Powers	I-Application
"	O
Best	O
of	O
the	O
Decade.	O
"	O
</s>
<s>
Guinness	O
World	O
Records	O
has	O
awarded	O
Mario	B-Application
Kart	I-Application
Wii	I-Application
with	O
a	O
record	O
for	O
being	O
the	O
best-selling	O
racing	O
video	O
game	O
of	O
all	O
time	O
.	O
</s>
