Spell Trap: "The user chanted a mystical spell at the enemy's team", so this entry hazard puts the foe to sleep upon entering the battle, this is a one-off so it will only put one pokemon to sleep.
PP = 10/10
Coal Shot: "The user shoots blazing hot coal around the enemy's feet!", you can guess what this does, this entry hazard burns the foe upon entering the arena. Like spell trap this is a one-off, however you can use the move twice to burn 2 different foes, or 3 times to burn 3 foes, etc.
Mines: "The user lays small mines around your enemy's feet", this hazard will always deal 1/16 damage no matter how many times you use it. When the mines explode, they also confuse the target.
Tesla Spikes: "The user lays electrical spikes around the enemy's feet", yep - paralysis.
Hmmm. Sleeping I don't really think will come, but the burning/paralysis around your feet definitely sounds good, although I'm not quite sure they're ready to move into side effects from entry hazards other than TSpikes.