Gon is from the manga with the same name. He has a game on NES, appeared on the PS1 version of Tekken 3, and most recently had a 3DS game. Now, I know what you're thinking. "Putting Gon in justifies Goku and Naruto." If you're thinking that, stop. Gon is viable because the creator of all his games have been Namco. DB and Naruto can't say the same.
Gon's Moveset:
Neutral Special: Fireball- Shoots a fireball, goes forward instead of bouncing. 6%
Side Special: Head Slam- Gon charges forward with his near-indestructible skull. If it connects, he throws the enemy up. 14%
Up Special: Flight Attempt- Gon flaps his arms in an attempt to fly, and gets some air as a result. No damage.
Down Special: Toxic Fart- Gon turns his ass towards his enemy and lets one rip. It does damage, and after the attack it continues to linger. 10% initial, 4% linger.
Final Smash: Still working on it.