<s>
Mario	B-Application
Tennis	I-Application
is	O
a	O
2000	O
sports	O
video	O
game	O
developed	O
by	O
Camelot	O
Software	O
Planning	O
and	O
published	O
by	O
Nintendo	O
for	O
the	O
Nintendo	B-Operating_System
64	I-Operating_System
.	O
</s>
<s>
Following	O
Mario	B-Application
's	I-Application
Tennis	I-Application
,	O
it	O
is	O
the	O
second	O
game	O
in	O
the	O
Mario	B-Application
Tennis	I-Application
series	O
.	O
</s>
<s>
Camelot	O
developed	O
a	O
Game	B-Device
Boy	I-Device
Color	I-Device
version	O
and	O
it	O
was	O
published	O
under	O
the	O
same	O
title	O
in	O
Western	O
regions	O
and	O
as	O
Mario	B-Application
Tennis	I-Application
GB	O
in	O
Japan	O
.	O
</s>
<s>
The	O
N64	B-Operating_System
version	O
was	O
re-released	O
on	O
the	B-Operating_System
Wii	I-Operating_System
and	O
Wii	B-Device
U	I-Device
Virtual	B-Application
Console	I-Application
,	O
and	O
on	O
the	O
Nintendo	B-Application
Switch	I-Application
Online	I-Application
+	I-Application
Expansion	I-Application
Pack	I-Application
,	O
in	O
2010	O
,	O
2015	O
,	O
and	O
2021	O
respectively	O
,	O
while	O
the	O
GBC	B-Device
version	O
was	O
re-released	O
on	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
Virtual	B-Application
Console	I-Application
in	O
2014	O
.	O
</s>
<s>
These	O
gameplay	O
mechanics	O
were	O
later	O
brought	O
to	O
the	O
newer	O
games	O
of	O
the	O
Mario	B-Application
Tennis	I-Application
series	O
.	O
</s>
<s>
Marking	O
the	O
sixth	O
Mario	B-Application
game	O
for	O
the	O
Nintendo	B-Operating_System
64	I-Operating_System
,	O
Mario	B-Application
Tennis	I-Application
brought	O
eleven	O
new	O
characters	O
to	O
the	O
Mario	B-Application
Tennis	I-Application
franchise	O
,	O
including	O
Waluigi	O
(	O
who	O
made	O
his	O
first	O
appearance	O
in	O
this	O
game	O
)	O
,	O
Princess	O
Daisy	O
,	O
Wario	O
,	O
Shy	O
Guy	O
,	O
Donkey	O
Kong	O
and	O
Birdo	O
.	O
</s>
<s>
The	O
Game	B-Device
Boy	I-Device
Color	I-Device
(	O
GBC	B-Device
)	O
version	O
features	O
a	O
role-playing	O
game	O
mode	O
,	O
which	O
is	O
not	O
in	O
the	O
Nintendo	B-Operating_System
64	I-Operating_System
(	O
N64	B-Operating_System
)	O
version	O
.	O
</s>
<s>
The	O
aim	O
of	O
this	O
mode	O
is	O
to	O
be	O
crowned	O
champion	O
at	O
the	O
academy	O
,	O
although	O
the	O
second	O
part	O
of	O
the	O
game	O
involves	O
the	O
player	O
competing	O
in	O
a	O
tournament	O
to	O
ultimately	O
face	O
Mario	B-Application
,	O
the	O
best	O
tennis	O
player	O
.	O
</s>
<s>
A	O
variety	O
of	O
human	O
and	O
Mario	B-Application
characters	O
are	O
available	O
for	O
the	O
player	O
to	O
use	O
.	O
</s>
<s>
Through	O
the	O
use	O
of	O
a	O
Nintendo	B-Operating_System
64	I-Operating_System
Transfer	B-Device
Pak	I-Device
,	O
players	O
are	O
able	O
to	O
import	O
their	O
characters	O
from	O
the	O
GBC	B-Device
version	O
of	O
Mario	B-Application
Tennis	I-Application
to	O
the	O
N64	B-Operating_System
game	O
,	O
as	O
well	O
as	O
the	O
characters	O
 '	O
stats	O
.	O
</s>
<s>
Using	O
these	O
characters	O
,	O
experience	O
points	O
may	O
be	O
earned	O
to	O
transfer	O
back	O
to	O
the	O
GBC	B-Device
version	O
.	O
</s>
<s>
As	O
the	O
characters	O
go	O
up	O
in	O
levels	O
,	O
the	O
player	O
may	O
send	O
their	O
improved	O
characters	O
to	O
the	O
N64	B-Operating_System
version	O
to	O
level	O
up	O
again	O
.	O
</s>
<s>
Linking	O
the	O
two	O
games	O
also	O
unlocks	O
Yoshi	B-Application
,	O
Wario	O
,	O
Waluigi	O
,	O
Bowser	O
and	O
their	O
respective	O
mini-games	O
in	O
the	O
GBC	B-Device
version	O
;	O
completing	O
these	O
mini-games	O
and	O
connecting	O
the	O
two	O
games	O
again	O
will	O
in	O
turn	O
unlock	O
up	O
to	O
six	O
new	O
tennis	O
courts	O
in	O
the	O
N64	B-Operating_System
version	O
.	O
</s>
<s>
All	O
Transfer	B-Device
Pak	I-Device
functionality	O
has	O
been	O
removed	O
from	O
subsequent	O
digital	O
re-releases	O
of	O
both	O
games	O
.	O
</s>
<s>
Other	O
features	O
,	O
such	O
as	O
the	O
Ring	O
Tournament	O
mode	O
in	O
the	O
N64	B-Operating_System
version	O
and	O
multiplayer	O
functionality	O
in	O
the	O
GBC	B-Device
version	O
,	O
are	O
also	O
omitted	O
.	O
</s>
<s>
At	O
Nintendo	O
's	O
suggestion	O
,	O
Princess	O
Daisy	O
was	O
brought	O
back	O
from	O
obscurity	O
after	O
having	O
only	O
ever	O
appeared	O
in	O
Super	B-Application
Mario	I-Application
Land	I-Application
and	O
NES	B-Application
Open	I-Application
Tournament	I-Application
Golf	I-Application
in	O
order	O
to	O
give	O
Luigi	O
a	O
doubles	O
partner	O
like	O
Mario	B-Application
had	O
Peach	O
.	O
</s>
<s>
Mario	B-Application
Tennis	I-Application
received	O
critical	O
acclaim	O
,	O
with	O
critics	O
citing	O
the	O
accessibility	O
and	O
depth	O
of	O
the	O
controls	O
as	O
being	O
very	O
impressive	O
.	O
</s>
<s>
The	O
Nintendo	B-Operating_System
64	I-Operating_System
version	O
received	O
"	O
universal	O
acclaim	O
"	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
<s>
The	O
game	O
was	O
a	O
runner-up	O
for	O
GameSpot	O
's	O
annual	O
"	O
Best	O
Nintendo	B-Operating_System
64	I-Operating_System
Game	O
"	O
award	O
,	O
losing	O
to	O
Perfect	B-Application
Dark	I-Application
.	O
</s>
<s>
Its	O
Game	B-Device
Boy	I-Device
Color	I-Device
version	O
was	O
nominated	O
for	O
the	O
publication	O
's	O
2001	O
"	O
Best	O
Game	B-Device
Boy	I-Device
Color	I-Device
Game	O
"	O
award	O
,	O
which	O
went	O
to	O
Oracle	B-Application
of	I-Application
Seasons	I-Application
and	I-Application
Oracle	I-Application
of	I-Application
Ages	I-Application
.	O
</s>
<s>
Dutch	O
magazine	O
Power	O
Unlimited	O
gave	O
the	O
N64	B-Operating_System
version	O
a	O
score	O
of	O
9.1	O
out	O
of	O
10	O
,	O
calling	O
it	O
very	O
addictive	O
,	O
especially	O
with	O
four	O
players	O
.	O
</s>
<s>
Mario	B-Application
Tennis	I-Application
sold	O
over	O
200,000	O
copies	O
within	O
two	O
weeks	O
of	O
its	O
release	O
.	O
</s>
<s>
It	O
became	O
the	O
eighth	O
best	O
selling	O
Game	B-Device
Boy	I-Device
Color	I-Device
game	O
in	O
Japan	O
,	O
with	O
357,987	O
copies	O
sold	O
.	O
</s>
