Go to Kami's hideout, where you find a missing namek. Keep going to the side - you will find the little thing where you fly. Go to Korin the cat. You have to find three fish to trade him for a senzu bean. To get the fish, you have to go to West City. Go all the way down West City, through Piccolo's gate. You will fight alligators, which sometimes drop fish.
Submitted by chris dbz fan
To get new moves with Gohan and Piccolo you have to be in the android saga. When the day comes to fight the androids Gohan learns Masanko Ball and Piccolo learns Special Beam Cannon. Then if you go to Master Roshis Island he will teach Gohan, Piccolo, and Vegeta 1 out of the 3 moves, whirlspin, twinslash, and superkick. Plus you learn Scatter Shot and you could be a Super Namek if you Fuse with Kami as Piccolo.
Submitted by Shawn DBZ Fan
Go to the northern mountains. Then find the spot for Goku to enter. It's left of the second save spot. DON'T BREAK THE DOOR! Stand on the wooden side and try to get the dinosaur's attention. Then keep using melee attacks. You should get a lot of experience points after you've killed it. :)
Submitted by Toocoolkid91