Two really cool combos: 
If you press x immediately after you do that jumpy diving thing(you know, the one where 
you flip real fast and jak bangs his head on the ground)then you'l jum back up extra high, 
about as high as the super jump. you can keep doing this combo indefinitely, jump, dive, 
high jump,dive high jump. note- press x while jak is flipping, just before he dives. 

2 press o, x, o, s, x, o, x,o. that's a grounded spin, jump, aerial attack, dive, jump, 
aerial attack, jump, aerial attack. note, this only works on the cliff where you push the 
flut flut egg, cuz theres a glitch there. also, try to hit the old lady. 

Submitted by _-_-_-__--__--__--_-__--_ tj, 13