diff --git a/Build.PL b/Build.PL
index c856bc3..c9026cd 100755
--- a/Build.PL
+++ b/Build.PL
@@ -18,6 +18,7 @@ my $build = Module::Build->new(
         'namespace::clean'            => 0,
         'Cairo::GObject'              => 0,
         'UUID::URandom'               => 0,
+        'Glib'                        => 0,
     },
 );
 $build->create_build_script;
diff --git a/lib/GEmeTool/Save.pm b/lib/GEmeTool/Save.pm
index fde6fe0..bce7869 100644
--- a/lib/GEmeTool/Save.pm
+++ b/lib/GEmeTool/Save.pm
@@ -27,6 +27,8 @@ has _initial_rematches => ( is => 'rw' );
 
 has _initial_flags => ( is => 'rw' );
 
+has _pc => ( is => 'rw' );
+
 sub instance {
     my $class      = shift;
     my $input_file = shift;
@@ -221,10 +223,15 @@ sub _get_flags_hash_by_id {
 
 sub get_pc_system {
     my $self       = shift;
+    if (defined $self->_pc) {
+        return $self->_pc;
+    }
     my $pc   = Rsaves::read_pc_storage($self->_get_current_save);
-    return GEmeTool::Save::PokemonPC->new(_pc => $pc, _save => sub {
+    my $return = GEmeTool::Save::PokemonPC->new(_pc => $pc, _save => sub {
         my $pc = shift;
         Rsaves::save_pc_changes($self->_get_current_save, $pc)
     });
+    $self->_pc($return);
+    return $return;
 }
 1;
diff --git a/lib/GEmeTool/Save/PokemonBox.pm b/lib/GEmeTool/Save/PokemonBox.pm
index 1e27714..57d7170 100644
--- a/lib/GEmeTool/Save/PokemonBox.pm
+++ b/lib/GEmeTool/Save/PokemonBox.pm
@@ -24,6 +24,10 @@ has _box => (
     required => 1,
 );
 
+has _pokemons => (
+    is       => 'rw',
+);
+
 sub wallpaper {
     my $self = shift;
     my $arg  = shift;
@@ -45,9 +49,19 @@ sub name {
 sub get_pokemon {
     my $self   = shift;
     my $number = shift;
+    my $pokemons = $self->_pokemons;
+    if (!defined $pokemons) {
+        $pokemons = [];
+        $self->_pokemons($pokemons);
+    }
     if ($number < 0 || $number > 29) {
         die "Pokemon boxes can only hold pokemon from 0 to 29, index $number invalid.";
     }
-    return GEmeTool::Save::Pokemon->new( _pokemon => $self->_box->[$number] );
+    if (defined $pokemons->[$number]) {
+        return $pokemons->[$number];
+    }
+    my $return = GEmeTool::Save::Pokemon->new( _pokemon => $self->_box->[$number] );
+    $pokemons->[$number] = $return;
+    return $return;
 }
 1;
diff --git a/lib/GEmeTool/Save/PokemonPC.pm b/lib/GEmeTool/Save/PokemonPC.pm
index 4836c5e..2191189 100644
--- a/lib/GEmeTool/Save/PokemonPC.pm
+++ b/lib/GEmeTool/Save/PokemonPC.pm
@@ -20,6 +20,10 @@ has _save => (
     required => 1,
 );
 
+has _boxes => (
+    is => 'rw',
+);
+
 sub boxes {
     my $self = shift;
     my $pc   = $self->_pc;
@@ -30,12 +34,21 @@ sub boxes {
     return \@boxes;
 }
 
+
 sub get_box {
     my $self = shift;
     my $number = shift;
+    my $boxes = $self->_boxes;
+    if (!defined $boxes) {
+        $self->_boxes([]);
+        $boxes = $self->_boxes;
+    }
     if ($number < 0 || $number > 13) {
         die "Bad box number $number.";
     }
+    if (defined $boxes->[$number]) {
+        return $boxes->[$number];
+    }
     my $pc = $self->_pc;
     my $wallpaper = \$pc->{wallpapers}[$number];
     my $name      = \$pc->{boxes_names}[$number];
@@ -45,6 +58,7 @@ sub get_box {
         _name      => $name,
         _box       => $box
     );
+    $boxes->[$number] = $return;
     return $return;
 }
 
diff --git a/lib/GEmeTool/View/MainWindow.pm b/lib/GEmeTool/View/MainWindow.pm
index eab1133..3032148 100644
--- a/lib/GEmeTool/View/MainWindow.pm
+++ b/lib/GEmeTool/View/MainWindow.pm
@@ -11,10 +11,11 @@ use Glib::IO;
 use Glib::Object::Introspection;
 use Data::Dumper;
 use Path::Tiny;
+
 use GEmeTool::Options;
 use GEmeTool::Save;
 use GEmeTool::View::LogWindow;
-use Cairo::GObject;
+use GEmeTool::View::PokemonPCWindow;
 
 use Moo;
 
@@ -219,11 +220,11 @@ sub open_file {
 }
 
 sub start_editing_file {
-    my $self      = shift;
-    my $file      = $self->_file;
-    my $save_as_action   = $self->_save_as_action;
-    my $pc_action = $self->_pc_action;
-    my $box_app   = Gtk4::Box->new( 'vertical', 0 );
+    my $self           = shift;
+    my $file           = $self->_file;
+    my $save_as_action = $self->_save_as_action;
+    my $pc_action      = $self->_pc_action;
+    my $box_app        = Gtk4::Box->new( 'vertical', 0 );
     $self->_save( GEmeTool::Save->instance($file) );
     my $save_obj = $self->_save;
 
@@ -324,82 +325,7 @@ sub activate_about {
 my $root = path(__FILE__)->parent->parent->parent->parent;
 
 sub activate_view_pc {
-    my $self       = shift;
-    my $gtk_window = Gtk4::Window->new;
-    my $canvas     = Gtk4::DrawingArea->new;
-    $gtk_window->set_default_size( 312, 340 );
-    $gtk_window->set_resizable(0);
-    $canvas->set_draw_func(
-        sub {
-            my $canvas = shift;
-            my $cairo  = shift;
-            my $width  = shift;
-            my $height = shift;
-
-            $self->draw_box($cairo);
-            $self->draw_pokemon($cairo);
-            $self->draw_box_name($cairo);
-        }
-    );
-    $gtk_window->set_child($canvas);
-    $gtk_window->present;
-}
-
-sub draw_box_name {
-    my $self       = shift;
-    my $cairo  = shift;
-    my $save  = $self->_save;
-    my $pc    = $save->get_pc_system;
-    my $box   = $pc->get_box(0);
-    my $name = Rsaves::translate_3rd_encoding($box->name);
-    $cairo->scale( 1, 1 );
-    $cairo->set_source_rgb(0, 0, 0);
-    $cairo->select_font_face('monospace', 'normal', 'normal');
-    $cairo->set_font_size(20);
-    $cairo->move_to(75 - (length($name) * 5), 19);
-    $cairo->show_text($name);
-}
-
-sub draw_pokemon {
-    my $self  = shift;
-    my $cairo = shift;
-    my $save  = $self->_save;
-    my $pc    = $save->get_pc_system;
-    my $box   = $pc->get_box(0);
-    $cairo->scale(0.95, 0.95);
-    for ( my $i = 0 ; $i < 5 ; $i++ ) {
-        # ROW
-        for ( my $j = 0 ; $j < 6 ; $j++ ) {
-            # COLUMN
-            my $pokemon = $box->get_pokemon($i*6 + $j);
-            my $pokemon_image =
-              $root->child($pokemon->get_image);
-            my $surface = Cairo::ImageSurface->create_from_png($pokemon_image);
-            my $output_image  = Cairo::ImageSurface->create( 'argb32', 32, 32 );
-            my $image_context = Cairo::Context->create($output_image);
-            $image_context->set_source_surface( $surface, 0, 0 );
-            $image_context->get_source()->set_filter('nearest');
-            $image_context->paint;
-            my $p = 25;
-            $cairo->set_source_surface( $output_image, $j * ($p + 1),
-                20 + ( ( $p - 3 ) * $i ) );
-            $cairo->get_source()->set_filter('nearest');
-            $cairo->paint;
-        }
-    }
-}
-
-sub draw_box {
-    my $self    = shift;
-    my $cairo   = shift;
-    my $surface = Cairo::ImageSurface->create_from_png(
-        $root->child('resources/forest.png') );
-
-    $cairo->scale( 2, 2 );
-    $cairo->set_source_surface( $surface, 0, 0 );
-    $cairo->get_source()->set_filter('nearest');
-
-    $cairo->paint;
-
+    my $self = shift;
+    GEmeTool::View::PokemonPCWindow->new( _save => $self->_save )->start;
 }
 1;
diff --git a/lib/GEmeTool/View/PokemonPCWindow.pm b/lib/GEmeTool/View/PokemonPCWindow.pm
new file mode 100644
index 0000000..1fac2ef
--- /dev/null
+++ b/lib/GEmeTool/View/PokemonPCWindow.pm
@@ -0,0 +1,234 @@
+package GEmeTool::View::PokemonPCWindow;
+
+use v5.16.3;
+
+use strict;
+use warnings;
+
+use Cairo::GObject;
+use Glib;
+use Glib::IO;
+use Path::Tiny;
+use Math::Trig;
+
+use Moo;
+
+Glib::Object::Introspection->setup(
+    basename => 'Gtk',
+    version  => '4.0',
+    package  => 'Gtk4',
+);
+
+Glib::Object::Introspection->setup(
+    basename => 'Gdk',
+    version  => '4.0',
+    package  => 'Gdk',
+);
+
+has _save => (
+    is       => 'ro',
+    required => 1,
+);
+
+
+my $BOX_X = 275;
+my $BOX_Y = 50;
+my $BOX_WIDTH = 312;
+my $BOX_HEIGHT = 340;
+
+has _cursor_position => ( is => 'rw' );
+
+my $root = path(__FILE__)->parent->parent->parent->parent;
+
+sub start {
+    my $self              = shift;
+    my $gtk_window        = Gtk4::Window->new;
+    my $controller_motion = Gtk4::EventControllerMotion->new;
+    $controller_motion->signal_connect(
+        motion => sub {
+            my ( $x, $y ) = @_[ 1, 2 ];
+            $self->_cursor_position( [ $x, $y ] );
+        }
+    );
+    my $canvas = Gtk4::DrawingArea->new;
+    $canvas->add_controller($controller_motion);
+    my $scale_factor_pc = 2.5;
+    my ($width, $height) = map { $_ * $scale_factor_pc } (256, 158);
+    $gtk_window->set_default_size( $width, $height );
+    $gtk_window->set_resizable(0);
+    $canvas->set_draw_func(
+        sub {
+            my $canvas = shift;
+            my $cairo  = shift;
+            my $width  = shift;
+            my $height = shift;
+
+            $self->draw_pc($cairo, $scale_factor_pc);
+            {
+                my $output_box    = Cairo::ImageSurface->create( 'argb32', $BOX_WIDTH, $BOX_HEIGHT );
+                my $box_context   = Cairo::Context->create($output_box);
+                $self->draw_box($box_context);
+                my $selected_pokemon = $self->get_selected_pokemon;
+                $self->draw_pokemon( $box_context, $selected_pokemon );
+                $self->draw_box_name($box_context);
+                $cairo->set_source_surface( $output_box, $BOX_X, $BOX_Y );
+                $cairo->paint;
+            }
+            $self->draw_cursor($cairo);
+        }
+    );
+    $gtk_window->set_child($canvas);
+    $gtk_window->present;
+    Glib::Timeout->add(
+        1000 / 15,
+        sub {
+            $canvas->queue_draw;
+            return 1;
+        }
+    );
+}
+
+sub draw_pc {
+    my $self = shift;
+    my $cairo  = shift;
+    my $scale_factor = shift;
+    $cairo->scale( ($scale_factor) x 2 );
+    my $surface = Cairo::ImageSurface->create_from_png($root->child('resources/pc_background.png'));
+    $cairo->set_source_surface( $surface, 0, 0 );
+    $cairo->get_source()->set_filter('nearest');
+    $cairo->paint;
+    $cairo->scale( ( 1 / $scale_factor ) x 2 );
+}
+
+sub draw_cursor {
+    my $self            = shift;
+    my $cairo           = shift;
+    my $cursor_png      = $root->child('resources/hand_cursor.png');
+    my $surface         = Cairo::ImageSurface->create_from_png($cursor_png);
+    my $output_image    = Cairo::ImageSurface->create( 'argb32', 32, 32 );
+    my $image_context   = Cairo::Context->create($output_image);
+    my $cursor_position = $self->_cursor_position;
+    return if !defined $cursor_position;
+    my $scale_factor = 0.95 * 2;
+    $cairo->scale( ($scale_factor) x 2 );
+    my ( $x, $y ) = map { $_ / $scale_factor } @$cursor_position;
+    $x -= 10;
+    $y -= 20;
+    $image_context->set_source_surface( $surface, 0, 0 );
+    $image_context->get_source()->set_filter('nearest');
+    $image_context->paint;
+    my $p = 25;
+    $cairo->set_source_surface( $output_image, $x, $y, );
+    $cairo->get_source()->set_filter('nearest');
+    $cairo->paint;
+    $cairo->scale( ( 1 / $scale_factor ) x 2 );
+}
+
+sub draw_box_name {
+    my $self         = shift;
+    my $cairo        = shift;
+    my $save         = $self->_save;
+    my $pc           = $save->get_pc_system;
+    my $box          = $pc->get_box(0);
+    my $name         = Rsaves::translate_3rd_encoding( $box->name );
+    my $scale_factor = 0.95 * 2;
+    $cairo->scale( $scale_factor, $scale_factor );
+    $cairo->set_source_rgb( 0, 0, 0 );
+    $cairo->select_font_face( 'monospace', 'normal', 'normal' );
+    $cairo->set_font_size(20);
+    $cairo->move_to( 75 - ( length($name) * 5 ), 19 );
+    $cairo->show_text($name);
+    $cairo->scale( ( 1 / $scale_factor ) x 2 );
+}
+
+sub draw_pokemon {
+    my $self             = shift;
+    my $cairo            = shift;
+    my $selected_pokemon = shift;
+    my $save             = $self->_save;
+    my $pc               = $save->get_pc_system;
+    my $box              = $pc->get_box(0);
+    my $scale_factor     = 0.95 * 2;
+    $cairo->scale( $scale_factor, $scale_factor );
+
+    for ( my $i = 0 ; $i < 5 ; $i++ ) {
+
+        # ROW
+        for ( my $j = 0 ; $j < 6 ; $j++ ) {
+
+            # COLUMN
+            my $pokemon = $box->get_pokemon( $i * 6 + $j );
+            my $is_selected =
+              defined $selected_pokemon && $pokemon eq $selected_pokemon;
+            my $pokemon_image = $root->child( $pokemon->get_image );
+            my $p             = 25;
+            my $x             = $j * ( $p + 1 );
+            my $y             = 20 + ( ( $p - 3 ) * $i );
+
+            if ($is_selected) {
+                $cairo->set_source_rgb( 1, 1, 0 );
+                $cairo->arc( $x + 5 + 11, $y + 10 + 11, 22/2, 0, pi*2 );
+                $cairo->fill;
+            }
+
+            my $surface = Cairo::ImageSurface->create_from_png($pokemon_image);
+            my $output_image  = Cairo::ImageSurface->create( 'argb32', 32, 32 );
+            my $image_context = Cairo::Context->create($output_image);
+            $image_context->set_source_surface( $surface, 0, 0 );
+            $image_context->get_source()->set_filter('nearest');
+            $image_context->paint;
+            $cairo->set_source_surface( $output_image, $x, $y );
+            $cairo->get_source()->set_filter('nearest');
+            $cairo->paint;
+        }
+    }
+    $cairo->scale( ( 1 / $scale_factor ) x 2 );
+}
+
+sub get_selected_pokemon {
+    my $self            = shift;
+    my $cursor_position = $self->_cursor_position;
+    return if !defined $cursor_position;
+    my ($x, $y) = @$cursor_position;
+
+    return if $x < $BOX_X;
+    return if $y < $BOX_Y;
+
+    $x -= $BOX_X;
+    $y -= $BOX_Y;
+
+    return if $x >= $BOX_WIDTH - 13;
+    return if $y >= $BOX_HEIGHT;
+
+    my $scale_factor = 0.95 * 2;
+    ( $x, $y ) = map { $_ / $scale_factor } ($x, $y);
+    return if $y <= 20;
+    $y -= 20;
+
+    my $p = 25;
+    my $i       = int( $y / ( $p - 3 ) );
+    my $j       = int( $x / ( $p + 1 ) );
+    my $save    = $self->_save;
+    my $pc      = $save->get_pc_system;
+    my $box     = $pc->get_box(0);
+    my $number  = $i * 6 + $j;
+    return if $number > 29;
+    my $pokemon = $box->get_pokemon($number);
+    return $pokemon;
+}
+
+sub draw_box {
+    my $self    = shift;
+    my $cairo   = shift;
+    my $surface = Cairo::ImageSurface->create_from_png(
+        $root->child('resources/forest.png') );
+
+    $cairo->scale( 2, 2 );
+    $cairo->set_source_surface( $surface, 0, 0 );
+    $cairo->get_source()->set_filter('nearest');
+
+    $cairo->paint;
+    $cairo->scale( 1 / 2, 1 / 2 );
+
+}
+1;
diff --git a/resources/hand_cursor.png b/resources/hand_cursor.png
new file mode 100644
index 0000000..1a87e68
Binary files /dev/null and b/resources/hand_cursor.png differ
diff --git a/resources/pc_background.png b/resources/pc_background.png
new file mode 100644
index 0000000..e47e082
Binary files /dev/null and b/resources/pc_background.png differ