<s>
Alex	B-Application
Kidd	I-Application
in	I-Application
Shinobi	I-Application
World	I-Application
is	O
a	O
side-scrolling	O
action	B-Application
game	I-Application
from	O
Sega	O
for	O
the	O
Master	O
System	O
in	O
1990	O
.	O
</s>
<s>
The	O
game	O
stars	O
Alex	O
Kidd	O
in	O
a	O
parody	O
version	O
of	O
Sega	O
's	O
ninja-themed	O
action	B-Application
game	I-Application
Shinobi	B-Application
,	O
where	O
Alex	O
Kidd	O
fights	O
against	O
caricatures	O
of	O
many	O
of	O
the	O
enemies	O
from	O
Shinobi	B-Application
.	O
</s>
<s>
It	O
was	O
re-released	O
for	O
the	B-Operating_System
Wii	I-Operating_System
Virtual	B-Application
Console	I-Application
in	O
2009	O
.	O
</s>
<s>
Despite	O
being	O
part	O
of	O
the	O
Alex	O
Kidd	O
series	O
,	O
the	O
game	O
mechanics	O
of	O
Shinobi	B-Application
World	O
are	O
different	O
from	O
Alex	B-Application
Kidd	I-Application
in	I-Application
Miracle	I-Application
World	I-Application
and	O
are	O
much	O
closer	O
to	O
the	O
Master	O
System	O
version	O
of	O
Shinobi	B-Application
.	O
</s>
<s>
An	O
evil	O
being	O
known	O
as	O
Hanzo	O
the	O
Dark	O
Ninja	O
escapes	O
after	O
10,000	O
years	O
of	O
confinement	O
and	O
kidnaps	O
Alex	O
Kidd	O
's	O
new	O
girlfriend	O
,	O
while	O
the	O
pair	O
are	O
on	O
a	O
leisurely	O
trip	O
to	O
the	O
planet	O
Shinobi	B-Application
.	O
</s>
<s>
The	O
game	O
is	O
composed	O
of	O
four	O
different	O
rounds	O
roughly	O
based	O
on	O
the	O
missions	O
from	O
the	O
original	O
Shinobi	B-Application
,	O
which	O
are	O
divided	O
into	O
three	O
stages	O
.	O
</s>
<s>
The	O
boss	O
is	O
"	O
Kabuto	O
"	O
(	O
a	O
parody	O
of	O
Ken-oh	O
and	O
originally	O
Mario	B-Application
)	O
,	O
a	O
warrior	O
in	O
samurai	O
armor	O
who	O
throws	O
fireballs	O
and	O
shrinks	O
into	O
a	O
smaller	O
size	O
after	O
sustaining	O
damage	O
.	O
</s>
<s>
The	O
boss	O
is	O
Hanzo	O
,	O
who	O
fights	O
using	O
several	O
attack	O
patterns	O
similar	O
to	O
the	O
Masked	O
Ninja	O
in	O
the	O
original	O
Shinobi	B-Application
.	O
</s>
<s>
In	O
2007	O
,	O
images	O
and	O
articles	O
began	O
to	O
surface	O
on	O
the	O
internet	O
,	O
that	O
like	O
Alex	B-Application
Kidd	I-Application
:	I-Application
High-Tech	I-Application
World	I-Application
,	O
Alex	O
Kidd	O
was	O
not	O
originally	O
intended	O
to	O
be	O
the	O
star	O
of	O
the	O
game	O
.	O
</s>
<s>
Rather	O
,	O
the	O
game	O
was	O
initially	O
devised	O
to	O
be	O
a	O
'	O
cute	O
 '	O
parody	O
of	O
Shinobi	B-Application
,	O
in	O
a	O
similar	O
vein	O
to	O
Kid	B-Application
Dracula	I-Application
was	O
to	O
Castlevania	B-Application
,	O
Parodius	B-Application
was	O
to	O
Gradius	B-Application
and	O
Star	B-Application
Parodier	I-Application
was	O
to	O
Star	B-Device
Soldier	I-Device
.	O
</s>
<s>
He	O
was	O
originally	O
named	O
"	O
Mari-Oh	O
"	O
and	O
was	O
designed	O
as	O
a	O
pastiche	O
of	O
Mario	B-Application
,	O
the	O
mascot	O
of	O
rival	O
game	O
developer	O
Nintendo	O
.	O
</s>
<s>
The	O
character	O
behaved	O
like	O
a	O
combination	O
of	O
Mario	B-Application
and	O
the	O
Shinobi	B-Application
villain	O
Ken-Oh	O
,	O
hence	O
the	O
name	O
.	O
</s>
<s>
Although	O
Mari-Oh	O
was	O
renamed	O
Kabuto	O
in	O
the	O
finished	O
,	O
with	O
a	O
redesign	O
that	O
downplayed	O
his	O
likeness	O
to	O
Mario	B-Application
,	O
his	O
attack	O
pattern	O
remained	O
unchanged	O
from	O
the	O
prototype	O
.	O
</s>
<s>
Alex	B-Application
Kidd	I-Application
in	I-Application
Shinobi	I-Application
World	I-Application
was	O
critically	O
acclaimed	O
upon	O
release	O
.	O
</s>
<s>
A	O
combination	O
of	O
Alex	B-Application
Kidd	I-Application
in	I-Application
Miracle	I-Application
World	I-Application
and	O
Shinobi	B-Application
"	O
that	O
"	O
works	O
really	O
well.	O
"	O
</s>
<s>
In	O
1991	O
,	O
Computer	O
and	O
Video	O
Games	O
described	O
the	O
game	O
as	O
"	O
probably	O
the	O
best	O
in	O
the	O
Alex	O
series	O
so	O
far	O
"	O
and	O
"	O
a	O
hilarious	O
mixture	O
of	O
Alex	O
Kidd	O
and	O
Shinobi.	O
"	O
</s>
<s>
Retrospectively	O
,	O
Allgame	O
gave	O
a	O
rating	O
of	O
3.5	O
out	O
of	O
5	O
stars	O
,	O
praising	O
the	O
game	O
for	O
being	O
a	O
successful	O
combination	O
of	O
both	O
Shinobi	B-Application
and	O
the	O
Alex	O
Kidd	O
games	O
,	O
including	O
the	O
game	O
characters	O
and	O
game	O
music	O
from	O
Shinobi	B-Application
while	O
retaining	O
the	O
platforming	O
style	O
from	O
Alex	O
Kidd	O
,	O
although	O
giving	O
criticism	O
to	O
the	O
gameplay	O
especially	O
boss	O
attack	O
patterns	O
and	O
jumps	O
being	O
obvious	O
and	O
too	O
easy	O
for	O
older	O
experienced	O
players	O
.	O
</s>
