<s>
Pokémon	B-Application
Pikachu	I-Application
,	O
also	O
known	O
as	O
in	O
Japan	O
,	O
is	O
a	O
limited	O
series	O
of	O
two	O
portable	O
Pokémon	B-Application
digital	O
pets	O
(	O
similar	O
to	O
Tamagotchi	O
)	O
featuring	O
the	O
famous	O
yellow	O
electric-type	O
Pokémon	B-Application
,	O
Pikachu	B-Application
.	O
</s>
<s>
The	O
first	O
release	O
,	O
a	O
yellow	O
unit	O
resembling	O
a	O
Game	B-Device
Boy	I-Device
,	O
features	O
a	O
black	O
and	O
white	O
LCD	B-Device
screen	I-Device
used	O
to	O
display	O
animations	O
of	O
Pikachu	B-Application
's	O
activities	O
.	O
</s>
<s>
Gameplay	O
differs	O
slightly	O
from	O
other	O
portable	O
virtual	O
pets	O
in	O
that	O
Pikachu	B-Application
does	O
not	O
need	O
to	O
be	O
fed	O
,	O
watered	O
,	O
or	O
cleaned	O
up	O
after	O
.	O
</s>
<s>
Instead	O
,	O
the	O
Pokémon	B-Application
Pikachu	I-Application
unit	O
can	O
be	O
strapped	O
to	O
a	O
belt	O
and	O
used	O
as	O
a	O
pedometer	O
.	O
</s>
<s>
With	O
every	O
twenty	O
steps	O
it	O
counts	O
,	O
the	O
Pokémon	B-Application
Pikachu	I-Application
credits	O
its	O
user	O
with	O
one	O
watt	O
,	O
a	O
virtual	O
currency	O
used	O
to	O
buy	O
Pikachu	B-Application
presents	O
.	O
</s>
<s>
Additional	O
activities	O
become	O
available	O
as	O
the	O
player	O
spends	O
more	O
time	O
with	O
their	O
virtual	O
Pikachu	B-Application
.	O
</s>
<s>
If	O
neglected	O
,	O
Pikachu	B-Application
will	O
express	O
anger	O
and	O
eventually	O
refuse	O
to	O
recognize	O
the	O
player	O
.	O
</s>
<s>
The	O
second	O
release	O
,	O
Pokémon	B-Application
Pikachu	I-Application
2	I-Application
GS	I-Application
,	O
is	O
available	O
in	O
clear	O
and	O
silver	O
casing	O
with	O
a	O
color	O
display	O
featuring	O
more	O
animations	O
.	O
</s>
<s>
It	O
features	O
an	O
infrared	O
port	O
for	O
interacting	O
with	O
Pokémon	B-Application
Gold	I-Application
,	I-Application
Silver	I-Application
,	O
and	O
Crystal	B-Application
via	O
the	O
Mystery	O
Gift	O
option	O
,	O
which	O
utilizes	O
the	O
Game	B-Device
Boy	I-Device
Color	I-Device
's	O
built-in	O
infrared	O
communication	O
port	O
.	O
</s>
<s>
This	O
allows	O
players	O
to	O
trade	O
watts	O
for	O
items	O
in	O
the	O
Game	B-Device
Boy	I-Device
games	O
.	O
</s>
<s>
Although	O
there	O
is	O
a	O
limitation	O
on	O
how	O
much	O
the	O
Mystery	O
Gift	O
mode	O
can	O
be	O
used	O
between	O
Game	B-Device
Boy	I-Device
cartridges	O
,	O
Pokémon	B-Application
Pikachu	I-Application
's	O
only	O
limit	O
is	O
that	O
of	O
available	O
watts	O
(	O
and	O
it	O
is	O
region	O
locked	O
)	O
.	O
</s>
<s>
Watts	O
can	O
also	O
be	O
sent	O
to	O
other	O
Pokémon	B-Application
Pikachu	I-Application
2	I-Application
units	O
.	O
</s>
<s>
Pokémon	B-Application
and	O
its	O
character	O
Pikachu	B-Application
are	O
not	O
the	O
only	O
media	O
franchises	O
that	O
are	O
used	O
by	O
this	O
Nintendo-made	O
device	O
.	O
</s>
<s>
Sakura	B-Application
Taisen	I-Application
,	O
a	O
media	O
franchise	O
of	O
SEGA	O
and	O
licensed	O
by	O
RED	O
Entertainment	O
released	O
a	O
virtual-pet	O
with	O
pedometer	O
,	O
in	O
the	O
same	O
style	O
as	O
the	O
Pokémon	B-Application
Pikachu	I-Application
2	I-Application
GS	I-Application
,	O
called	O
Pocket	O
Sakura	O
( ポケットサクラ	O
)	O
and	O
Sakura	B-Application
Taisen	I-Application
GB	O
,	O
developed	O
by	O
Jupiter	O
.	O
</s>
<s>
This	O
featured	O
a	O
similar	O
design	O
to	O
the	O
first	O
Pokémon	B-Application
Pikachu	I-Application
,	O
with	O
a	O
game	O
based	O
on	O
Hello	O
Kitty	O
and	O
her	O
friends	O
,	O
available	O
in	O
a	O
pink-colored	O
case	O
.	O
</s>
<s>
In	O
2009	O
,	O
a	O
device	O
similar	O
to	O
the	O
Pokémon	B-Application
Pikachu	I-Application
called	O
the	O
Pokéwalker	O
,	O
came	O
packaged	O
with	O
Pokémon	B-Application
HeartGold	I-Application
and	I-Application
SoulSilver	I-Application
which	O
communicates	O
directly	O
with	O
the	O
Nintendo	O
DS	O
game	O
cards	O
via	O
infrared	O
.	O
</s>
<s>
It	O
allowed	O
the	O
player	O
to	O
transfer	O
one	O
Pokémon	B-Application
at	O
a	O
time	O
from	O
their	O
HeartGold	B-Application
or	O
SoulSilver	B-Application
.	O
</s>
<s>
The	O
user	O
is	O
able	O
to	O
catch	O
Pokémon	B-Application
and	O
find	O
items	O
by	O
spending	O
watts	O
.	O
</s>
