They're fighting game terms. 

A shotoclone is an allrounder, with not too many overpowered super-moves that require tricky button presses. They're usually the first character you can pick in fighting games. The Ur example is Ryu from street fighter. They usually center around three moves, a fireball they can spam from across the stage, a big, powerful, but slow to wind up rush or kick that leaves them open if they miss, and a big, showy uppercut to swat at the opponents who'll jump over their fireball. In Fighting games, there's usually a time limit, so sitting at one end of the stage and blocking the fireballs isn't really a good strategy. So it always comes down to who's going to move first, and if they can get past the uppercut and strike them while they're doing the uppercut or getting around it. The term comes from Shotokan Karate, which is what Ryu and Ken were meant to be performing in street fighter.

A grappler character is a big, stronk, heavy guy who's strongest attacks revolve around grabbing the other character and throwing him. In fighting games, a throw will always beat a shield, but will be beaten in turn by just punching them before they can punch you. They're the scissors in the strategy game of fighting games, and they'll usually have not a lot of projectile weapons to encourage that style of play of just grabbing a guy and suplexing his ass. Think Zangeif or Alex.

A zoner is a character who's completely opposite to the Grappler. Their entire strategy revolves around playing keep-away with their opponent, using projectiles with wierd arcs and laying traps down to make up for the fact that their shield is weak and their throws can't get the opponent away far enough. Think Dhalsim or Ingrid.

[url=https://www.youtube.com/watch?v=KS7hkwbKmBM]Fighting games are really worth getting into, by the way.[/url]