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- 

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