<s>
is	O
a	O
title	O
in	O
the	O
Mega	B-Application
Man	I-Application
Battle	I-Application
Network	I-Application
sub-series	O
of	O
Mega	B-Application
Man	I-Application
video	O
games	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
only	O
in	O
Japan	O
on	O
August	O
6	O
,	O
2004	O
,	O
and	O
is	O
not	O
part	O
of	O
the	O
main	O
Mega	B-Application
Man	I-Application
Battle	I-Application
Network	I-Application
storyline	O
.	O
</s>
<s>
In	O
Real	O
Operation	O
,	O
the	O
Game	B-Device
Boy	I-Device
Advance	I-Device
itself	O
acts	O
as	O
a	O
PET	O
,	O
allowing	O
the	O
player	O
to	O
control	O
various	O
NetNavis	O
from	O
previous	O
games	O
in	O
the	O
series	O
.	O
</s>
<s>
Real	O
Operation	O
is	O
also	O
compatible	O
with	O
the	O
Nintendo	B-Application
e-Reader	I-Application
,	O
which	O
allows	O
for	O
the	O
unlocking	O
of	O
certain	O
Navis	O
,	O
some	O
of	O
which	O
are	O
required	O
to	O
complete	O
the	O
game	O
.	O
</s>
<s>
The	O
game	O
also	O
features	O
a	O
real-time	B-Application
system	O
and	O
on	O
certain	O
days	O
of	O
the	O
week	O
,	O
tournaments	O
will	O
be	O
held	O
in-game	O
that	O
the	O
player	O
can	O
compete	O
in	O
,	O
or	O
you	O
can	O
set	O
reminders	O
on	O
calendars	O
that	O
your	O
Navi	O
will	O
keep	O
track	O
of	O
.	O
</s>
<s>
Darkloid	O
versions	O
of	O
Navis	O
that	O
appeared	O
in	O
Mega	B-Application
Man	I-Application
Battle	I-Application
Network	I-Application
4	O
(	O
such	O
as	O
TopMan	O
)	O
also	O
appear	O
in	O
cyberspace	O
for	O
the	O
player	O
to	O
battle	O
against	O
.	O
</s>
<s>
While	O
the	O
game	O
was	O
not	O
released	O
in	O
the	O
US	O
,	O
hacking	O
in	O
Battle	B-Application
Network	I-Application
5	I-Application
:	O
Double	B-Application
Team	I-Application
DS	I-Application
shows	O
that	O
the	O
game	O
can	O
in	O
fact	O
,	O
be	O
run	O
exactly	O
the	O
same	O
way	O
as	O
4.5	O
,	O
using	O
the	O
same	O
windows	O
and	O
such	O
,	O
though	O
the	O
player	O
is	O
stuck	O
using	O
only	O
Megaman	B-Application
and	O
whatever	O
chips	O
they	O
start	O
with	O
.	O
</s>
<s>
Initially	O
,	O
the	O
player	O
can	O
only	O
choose	O
from	O
MegaMan	B-Application
,	O
Roll	O
,	O
GutsMan	O
,	O
and	O
NumberMan	O
as	O
their	O
Navi	O
companion	O
.	O
</s>
<s>
There	O
are	O
a	O
total	O
of	O
21	O
Navis	O
for	O
the	O
player	O
to	O
use	O
,	O
including	O
all	O
12	O
Soul	O
Unison	O
Navis	O
from	O
Mega	B-Application
Man	I-Application
Battle	I-Application
Network	I-Application
4	O
.	O
</s>
<s>
StarMan	O
is	O
the	O
only	O
Navi	O
who	O
did	O
not	O
previously	O
appear	O
in	O
a	O
title	O
released	O
on	O
the	O
Game	B-Device
Boy	I-Device
Advance	I-Device
.	O
</s>
<s>
(	O
His	O
only	O
prior	O
appearance	O
was	O
the	O
GameCube-exclusive	O
Mega	B-Application
Man	I-Application
Network	I-Application
Transmission	I-Application
.	O
)	O
</s>
<s>
The	O
playable	O
Navis	O
include	O
MegaMan	B-Application
(	O
Rockman	O
in	O
Japan	O
)	O
,	O
Roll	O
,	O
GutsMan	O
,	O
NumberMan	O
,	O
FireMan	O
,	O
WoodMan	O
,	O
WindMan	O
,	O
SearchMan	O
,	O
AquaMan	O
(	O
also	O
known	O
as	O
SpoutMan	O
in	O
Battle	B-Application
Network	I-Application
6	I-Application
)	O
,	O
ThunderMan	O
,	O
MetalMan	O
,	O
JunkMan	O
,	O
ProtoMan	O
(	O
Blues	O
in	O
Japan	O
)	O
,	O
StarMan	O
,	O
NapalmMan	O
,	O
IceMan	O
,	O
ElecMan	O
,	O
PlantMan	O
,	O
KnightMan	O
,	O
ShadowMan	O
,	O
and	O
Bass	O
(	O
Forte	O
in	O
Japan	O
)	O
.	O
</s>
<s>
As	O
a	O
homage	O
to	O
the	O
original	O
Mega	B-Application
Man	I-Application
series	O
,	O
each	O
Navi	O
has	O
a	O
musical	O
theme	O
,	O
and	O
most	O
of	O
them	O
are	O
rearrangements	O
of	O
the	O
themes	O
used	O
for	O
their	O
Robot	O
Master	O
counterparts	O
in	O
the	O
original	O
games	O
.	O
</s>
<s>
For	O
example	O
,	O
IceMan	O
's	O
theme	O
is	O
a	O
remixed	O
version	O
of	O
his	O
stage	O
theme	O
from	O
the	O
very	O
first	O
Mega	B-Application
Man	I-Application
game	O
released	O
on	O
the	O
NES	O
.	O
</s>
<s>
Finally	O
,	O
MegaMan	B-Application
's	O
theme	O
is	O
instead	O
a	O
rearrangement	O
of	O
the	O
title	O
theme	O
used	O
for	O
the	O
first	O
three	O
Battle	O
Network	O
games	O
,	O
used	O
in	O
the	O
original	O
Mega	B-Application
Man	I-Application
games	O
;	O
ProtoMan	O
's	O
is	O
his	O
trademark	O
"	O
whistle	O
"	O
theme	O
first	O
introduced	O
in	O
Mega	B-Application
Man	I-Application
3	O
;	O
and	O
Bass	O
's	O
is	O
the	O
theme	O
introduced	O
in	O
Mega	B-Application
Man	I-Application
7	O
when	O
he	O
battles	O
with	O
Mega	B-Application
Man	I-Application
for	O
the	O
first	O
time	O
.	O
</s>
<s>
Rockman	B-Device
EXE	I-Device
4.5	I-Device
Real	I-Device
Operation	I-Device
sold	O
approximately	O
14,693	O
copies	O
during	O
its	O
first	O
few	O
days	O
on	O
sale	O
in	O
Japan	O
.	O
</s>
<s>
The	O
game	O
was	O
re-released	O
for	O
the	O
Wii	B-Device
U	I-Device
Virtual	B-Application
console	I-Application
in	O
2016	O
.	O
</s>
