Current cheats for PE based games have some issues

PE 18 is missing $ItemData

# cheat_rpgmxp.rb lines 33-43
    def getDisplayName(item)
      itemname=PBItems.getName(item)
      return itemname unless $ItemData # skip if PE18
      if $ItemData[item][ITEMPOCKET]==3
        machine=$ItemData[item][ITEMMACHINE]
        itemname=_INTL("{1} {2}",itemname,PBMoves.getName(machine))
      elsif $ItemData[item][ITEMPOCKET]==4 #mod
        firstberry=PBItems::CHERIBERRY
        itemname=_ISPRINTF("No{1:02d} {2:s}",item-firstberry+1,itemname)
      end
      return itemname
    end

PE 20~21 uses $player instead or $Trainer

$Trainer is now known as $player, and $PokemonBag is now $bag. Any mentions of these in script commands in your events will be automatically changed by the Compiler (which will also make a few other changes like that). The methods in $bag have been renamed to be shorter and simpler.

from https://luka-sj.com/res/PE20

# cheat_pe19.rb lines 52-54
      ($player || $Trainer).party.each{|pokemon|
        @partyArray.push(pokemon.name)
      }
# cheat_pe19.rb lines 104-106
          ($player || $Trainer).party.each{|pokemon|
            pokemon.heal
          }

Pokémon Reminiscencia and Pokémon Plasma have additional argument in PokemonMartAdapter#getPrice

# cheat_pe19.rb lines 15-17
    def getPrice(item, selling = false, unlimited_or_discount = nil)
      return 0
    end

PE GSC has additional argument in Game_Player#passable?

# pokefix.rb lines 108-114
      def passable?(x, y, d, strict = false)
        if $wtw
          return true
        else
          cheatPassable?(x, y, d, strict)
        end
      end

Also, maybe switch back to HOME button for cheats instead of F8?
F8 is usually used for screenshots, so every time a cheats are triggered, a screenshot is taken