Preety easy, not the full song really, but it's what i fugured out.
listen to the song for the whole rythm of it
G|----------3------5----------------------------------3------5-----------|
D|---5----2---3------5-------------------------5----2---3------5---------|
A|-3---44------33------111-3---11111111111---3---44------33------111-3---|
E|-----------------------------------------------------------------------|
G|------------------------------------------------|
D|---------------------2--------------------------|
A|-------------3-34-11--1-131-1----------66654444-|
E|44444444444----------------3--3333-6666---------|
after that bass part, there is a guitar part, which is this-
[ Tab from: http://www.guitaretab.com/m/misc-computer-games/229781.html ]
e|-31-----------------------|
B|---43-343464--------------|
G|-------------3------------|
D|---------------5-53-35-5--|
A|--------------------------|
E|--------------------------|
Then back into the bass...
G|-53-232---------|
D|--------54-3413-| x4
A|----------6-----|
E|----------------|
And then the guitar comes in with the main riff after that
e|----------------------------------------------------------------------|
B|------------------------7-8-------------------------------------------|
G|-5---8-7-5------5-3-5-8-6-7-------------------------------------------|
D|-5-5-8-7-5-6-5--5-3-5-8-4-5-------------------------------------------|
A|-3-5-6-5-3-6-5--3-1-3-6-----------------------------------------------|
E|---3-------4-3--------------------------------------------------------|
and there you have it, all of the epic parts of cortex's boss theme in crash bandicoot 2