<s>
Rainbow	B-Application
Islands	I-Application
Evolution	I-Application
is	O
a	O
game	O
in	O
the	O
Bubble	B-Application
Bobble	I-Application
series	O
for	O
the	O
PSP	B-Operating_System
system	O
.	O
</s>
<s>
It	O
is	O
an	O
enhanced	O
remake	O
of	O
the	O
arcade	O
game	O
Rainbow	B-Application
Islands	I-Application
.	O
</s>
<s>
Bub	O
and	O
Bob	O
,	O
the	O
two	O
main	O
characters	O
in	O
the	O
series	O
,	O
are	O
against	O
an	O
evil	O
recording	O
company	O
that	O
seeks	O
to	O
pollute	O
the	O
Rainbow	B-Application
Islands	I-Application
 '	O
atmosphere	O
by	O
creating	O
constant	O
musical	O
noise	O
,	O
therefore	O
wilting	O
the	O
flora	O
and	O
mutating	O
the	O
fauna	O
.	O
</s>
<s>
The	O
game	O
received	O
"	O
generally	O
unfavorable	O
reviews	O
"	O
according	O
to	O
the	O
review	B-Application
aggregation	I-Application
website	O
Metacritic	O
.	O
</s>
