# Pokemon fall asleep after a battle if and only if they are not at full health and they do not already have a status, as well as a bit of a random chance. The trainer has to walk a bit before the pokemon might fall asleep. I have the rates set way too high. Pokemon have a chance to wake up when their hp is full. Credit to Riviera for the idea, and I'll probably edit this with the proper styled header once I have their approval for the implementation.
OVERWORLDRESTSTEPTHRESHOLD    = 30 # 30 steps to have chance of sleeping
OVERWORLDRESTSLEEPCHANCE      = 4  # 1/4 chance of falling asleep
OVERWORLDRESTWAKECHANCE       = 4  # 1/4 chance of staying asleep at full health
OVERWORLDRESTHEALFRACTION     = 16 # 1/16 of total hp healed

class PokeBattle_Pokemon
  attr_accessor(:overworldreststeps)
  
  def overworldreststeps
    @overworldreststeps=0 if !@overworldreststeps
    return @overworldreststeps
  end
end

Events.onEndBattle+=proc {|sender,e|
   decision = e[0]
   canlose  = e[1]
   for pkmn in $Trainer.party
     pkmn.overworldreststeps=0
   end
}

Events.onStepTaken+=proc {|sender,e|
   next if !$Trainer
   for pkmn in $Trainer.party
     pkmn.overworldreststeps+=1
     if pkmn.status==0 && pkmn.hp!=pkmn.totalhp &&
         pkmn.overworldreststeps>OVERWORLDRESTSTEPTHRESHOLD &&
         rand(OVERWORLDRESTSLEEPCHANCE)==0
       pkmn.status=PBStatuses::SLEEP
       pkmn.statusCount=3
     end
     if pkmn.status==PBStatuses::SLEEP
       pkmn.hp+=(pkmn.totalhp/OVERWORLDRESTHEALFRACTION).floor
       pkmn.hp=pkmn.totalhp if pkmn.hp>pkmn.totalhp
       if pkmn.hp==pkmn.totalhp
         pkmn.healStatus if rand(OVERWORLDRESTWAKECHANCE)==0
       end
     end
   end
}