diff --git a/locale/ID.po b/locale/ID.po
index 2e01bfe9a767..949eddc4bf9b 100644
--- a/locale/ID.po
+++ b/locale/ID.po
@@ -2575,7 +2575,7 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr ""
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
+msgid "unsupported %q type"
 msgstr ""
 
 #: py/objstr.c
diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
index e38aa77279d2..3416ef0f3141 100644
--- a/locale/circuitpython.pot
+++ b/locale/circuitpython.pot
@@ -2528,7 +2528,7 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr ""
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
+msgid "unsupported %q type"
 msgstr ""
 
 #: py/objstr.c
diff --git a/locale/de_DE.po b/locale/de_DE.po
index ae76bc76c871..8bb5ce370b6a 100644
--- a/locale/de_DE.po
+++ b/locale/de_DE.po
@@ -2584,8 +2584,8 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr ""
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
-msgstr "Nicht unterstützter Bitmap-Typ"
+msgid "unsupported %q type"
+msgstr "Nicht unterstützter %q-Typ"
 
 #: py/objstr.c
 #, c-format
diff --git a/locale/en_US.po b/locale/en_US.po
index fb62ea2b03dd..79f4ab06deee 100644
--- a/locale/en_US.po
+++ b/locale/en_US.po
@@ -2528,7 +2528,7 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr ""
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
+msgid "unsupported %q type"
 msgstr ""
 
 #: py/objstr.c
diff --git a/locale/en_x_pirate.po b/locale/en_x_pirate.po
index 24af776c0332..db068589bd58 100644
--- a/locale/en_x_pirate.po
+++ b/locale/en_x_pirate.po
@@ -2532,7 +2532,7 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr ""
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
+msgid "unsupported %q type"
 msgstr ""
 
 #: py/objstr.c
diff --git a/locale/es.po b/locale/es.po
index 661c591d31b6..0592af24223b 100644
--- a/locale/es.po
+++ b/locale/es.po
@@ -2614,8 +2614,8 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr "instrucción Xtensa '%s' con %d argumentos no soportada"
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
-msgstr "tipo de bitmap no soportado"
+msgid "unsupported %q type"
+msgstr "tipo de %q no soportado"
 
 #: py/objstr.c
 #, c-format
diff --git a/locale/fil.po b/locale/fil.po
index 7873ec6853f8..b34e7bb1b282 100644
--- a/locale/fil.po
+++ b/locale/fil.po
@@ -2616,8 +2616,8 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr "hindi sinusuportahan ang instruction ng Xtensa '%s' sa %d argumento"
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
-msgstr "Hindi supportadong tipo ng bitmap"
+msgid "unsupported %q type"
+msgstr "Hindi supportadong tipo ng %q"
 
 #: py/objstr.c
 #, c-format
diff --git a/locale/fr.po b/locale/fr.po
index 9c723333d64a..df3af424e6d0 100644
--- a/locale/fr.po
+++ b/locale/fr.po
@@ -2638,8 +2638,8 @@ msgstr "instruction Xtensa '%s' non supportée avec %d arguments"
 
 #: shared-bindings/displayio/TileGrid.c
 #, fuzzy
-msgid "unsupported bitmap type"
-msgstr "type de bitmap non supporté"
+msgid "unsupported %q type"
+msgstr "type de %q non supporté"
 
 #: py/objstr.c
 #, c-format
diff --git a/locale/it_IT.po b/locale/it_IT.po
index c14b3698badb..7714530f643d 100644
--- a/locale/it_IT.po
+++ b/locale/it_IT.po
@@ -2614,8 +2614,8 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr "istruzione '%s' Xtensa non supportata con %d argomenti"
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
-msgstr "tipo di bitmap non supportato"
+msgid "unsupported %q type"
+msgstr "tipo di %q non supportato"
 
 #: py/objstr.c
 #, c-format
diff --git a/locale/pl.po b/locale/pl.po
index 1b861fff0fab..888103fd3eb9 100644
--- a/locale/pl.po
+++ b/locale/pl.po
@@ -2561,8 +2561,8 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr "niewspierana instrukcja Xtensa '%s' z %d argumentami"
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
-msgstr "niewspierany typ bitmapy"
+msgid "unsupported %q type"
+msgstr "niewspierany typ %q"
 
 #: py/objstr.c
 #, c-format
diff --git a/locale/pt_BR.po b/locale/pt_BR.po
index 4685e9c82a6e..047b654b48af 100644
--- a/locale/pt_BR.po
+++ b/locale/pt_BR.po
@@ -2565,7 +2565,7 @@ msgid "unsupported Xtensa instruction '%s' with %d arguments"
 msgstr ""
 
 #: shared-bindings/displayio/TileGrid.c
-msgid "unsupported bitmap type"
+msgid "unsupported %q type"
 msgstr ""
 
 #: py/objstr.c
diff --git a/ports/atmel-samd/boards/pybadge/board.c b/ports/atmel-samd/boards/pybadge/board.c
index f234db8caf65..ba18a28966de 100644
--- a/ports/atmel-samd/boards/pybadge/board.c
+++ b/ports/atmel-samd/boards/pybadge/board.c
@@ -71,7 +71,7 @@ uint8_t display_init_sequence[] = {
 
 void board_init(void) {
     busio_spi_obj_t* spi = &displays[0].fourwire_bus.inline_bus;
-    common_hal_busio_spi_construct(spi, &pin_PB13, &pin_PB12, NULL);
+    common_hal_busio_spi_construct(spi, &pin_PB13, &pin_PB15, NULL);
     common_hal_busio_spi_never_reset(spi);
 
     displayio_fourwire_obj_t* bus = &displays[0].fourwire_bus;
diff --git a/ports/atmel-samd/boards/pybadge/mpconfigboard.mk b/ports/atmel-samd/boards/pybadge/mpconfigboard.mk
index 8ab759865607..8828c17b270a 100644
--- a/ports/atmel-samd/boards/pybadge/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/pybadge/mpconfigboard.mk
@@ -6,7 +6,7 @@ USB_MANUFACTURER = "Adafruit Industries LLC"
 
 QSPI_FLASH_FILESYSTEM = 1
 EXTERNAL_FLASH_DEVICE_COUNT = 1
-EXTERNAL_FLASH_DEVICES = GD25Q64C
+EXTERNAL_FLASH_DEVICES = GD25Q16C
 LONGINT_IMPL = MPZ
 
 # No I2S on SAMD51G
diff --git a/py/objtype.c b/py/objtype.c
index f205c224e65c..4dec478e9601 100644
--- a/py/objtype.c
+++ b/py/objtype.c
@@ -964,6 +964,18 @@ STATIC bool check_for_special_accessors(mp_obj_t key, mp_obj_t value) {
     #endif
     return false;
 }
+
+STATIC bool map_has_special_accessors(const mp_map_t *map) {
+    for (size_t i = 0; i < map->alloc; i++) {
+        if (MP_MAP_SLOT_IS_FILLED(map, i)) {
+            const mp_map_elem_t *elem = &map->table[i];
+            if (check_for_special_accessors(elem->key, elem->value)) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
 #endif
 
 STATIC void type_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
@@ -1158,20 +1170,6 @@ mp_obj_t mp_obj_new_type(qstr name, mp_obj_t bases_tuple, mp_obj_t locals_dict)
 
     o->locals_dict = make_dict_long_lived(locals_dict, 10);
 
-    #if ENABLE_SPECIAL_ACCESSORS
-    // Check if the class has any special accessor methods
-    if (!(o->flags & TYPE_FLAG_HAS_SPECIAL_ACCESSORS)) {
-        for (size_t i = 0; i < o->locals_dict->map.alloc; i++) {
-            if (MP_MAP_SLOT_IS_FILLED(&o->locals_dict->map, i)) {
-                const mp_map_elem_t *elem = &o->locals_dict->map.table[i];
-                if (check_for_special_accessors(elem->key, elem->value)) {
-                    o->flags |= TYPE_FLAG_HAS_SPECIAL_ACCESSORS;
-                    break;
-                }
-            }
-        }
-    }
-    #endif
 
     const mp_obj_type_t *native_base;
     size_t num_native_bases = instance_count_native_bases(o, &native_base);
@@ -1180,6 +1178,16 @@ mp_obj_t mp_obj_new_type(qstr name, mp_obj_t bases_tuple, mp_obj_t locals_dict)
     }
 
     mp_map_t *locals_map = &o->locals_dict->map;
+    #if ENABLE_SPECIAL_ACCESSORS
+    // Check if the class has any special accessor methods
+    if (!(o->flags & TYPE_FLAG_HAS_SPECIAL_ACCESSORS) &&
+            (map_has_special_accessors(locals_map) ||
+             (num_native_bases == 1 &&
+              map_has_special_accessors(&native_base->locals_dict->map)))) {
+        o->flags |= TYPE_FLAG_HAS_SPECIAL_ACCESSORS;
+    }
+    #endif
+
     mp_map_elem_t *elem = mp_map_lookup(locals_map, MP_OBJ_NEW_QSTR(MP_QSTR___new__), MP_MAP_LOOKUP);
     if (elem != NULL) {
         // __new__ slot exists; check if it is a function
diff --git a/shared-bindings/displayio/Display.c b/shared-bindings/displayio/Display.c
index c4f65704f700..17f275bc0736 100644
--- a/shared-bindings/displayio/Display.c
+++ b/shared-bindings/displayio/Display.c
@@ -157,13 +157,19 @@ STATIC mp_obj_t displayio_display_make_new(const mp_obj_type_t *type, size_t n_a
     return self;
 }
 
+// Helper to ensure we have the native super class instead of a subclass.
+static displayio_display_obj_t* native_display(mp_obj_t display_obj) {
+    mp_obj_t native_display = mp_instance_cast_to_native_base(display_obj, &displayio_display_type);
+    return MP_OBJ_TO_PTR(native_display);
+}
+
 //|   .. method:: show(group)
 //|
 //|     Switches to displaying the given group of layers. When group is None, the default
 //|     CircuitPython terminal will be shown.
 //|
 STATIC mp_obj_t displayio_display_obj_show(mp_obj_t self_in, mp_obj_t group_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     displayio_group_t* group = NULL;
     if (group_in != mp_const_none) {
         mp_obj_t native_layer = mp_instance_cast_to_native_base(group_in, &displayio_group_type);
@@ -183,7 +189,7 @@ MP_DEFINE_CONST_FUN_OBJ_2(displayio_display_show_obj, displayio_display_obj_show
 //|     Queues up a display refresh that happens in the background.
 //|
 STATIC mp_obj_t displayio_display_obj_refresh_soon(mp_obj_t self_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     common_hal_displayio_display_refresh_soon(self);
     return mp_const_none;
 }
@@ -195,7 +201,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_refresh_soon_obj, displayio_display_
 //|     behind the rendered frames. In that case, this will return immediately with the wait count.
 //|
 STATIC mp_obj_t displayio_display_obj_wait_for_frame(mp_obj_t self_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     return MP_OBJ_NEW_SMALL_INT(common_hal_displayio_display_wait_for_frame(self));
 }
 MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_wait_for_frame_obj, displayio_display_obj_wait_for_frame);
@@ -207,7 +213,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_wait_for_frame_obj, displayio_displa
 //|     effect. To control the brightness, auto_brightness must be false.
 //|
 STATIC mp_obj_t displayio_display_obj_get_brightness(mp_obj_t self_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     mp_float_t brightness = common_hal_displayio_display_get_brightness(self);
     if (brightness < 0) {
         mp_raise_RuntimeError(translate("Brightness not adjustable"));
@@ -217,7 +223,7 @@ STATIC mp_obj_t displayio_display_obj_get_brightness(mp_obj_t self_in) {
 MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_get_brightness_obj, displayio_display_obj_get_brightness);
 
 STATIC mp_obj_t displayio_display_obj_set_brightness(mp_obj_t self_in, mp_obj_t brightness) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     bool ok = common_hal_displayio_display_set_brightness(self, mp_obj_get_float(brightness));
     if (!ok) {
         mp_raise_RuntimeError(translate("Brightness not adjustable"));
@@ -238,13 +244,13 @@ const mp_obj_property_t displayio_display_brightness_obj = {
 //|     True when the display brightness is auto adjusted.
 //|
 STATIC mp_obj_t displayio_display_obj_get_auto_brightness(mp_obj_t self_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     return mp_obj_new_bool(common_hal_displayio_display_get_auto_brightness(self));
 }
 MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_get_auto_brightness_obj, displayio_display_obj_get_auto_brightness);
 
 STATIC mp_obj_t displayio_display_obj_set_auto_brightness(mp_obj_t self_in, mp_obj_t auto_brightness) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
 
     common_hal_displayio_display_set_auto_brightness(self, mp_obj_is_true(auto_brightness));
 
@@ -265,7 +271,7 @@ const mp_obj_property_t displayio_display_auto_brightness_obj = {
 //|
 //|
 STATIC mp_obj_t displayio_display_obj_get_width(mp_obj_t self_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     return MP_OBJ_NEW_SMALL_INT(common_hal_displayio_display_get_width(self));
 }
 MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_get_width_obj, displayio_display_obj_get_width);
@@ -283,7 +289,7 @@ const mp_obj_property_t displayio_display_width_obj = {
 //|
 //|
 STATIC mp_obj_t displayio_display_obj_get_height(mp_obj_t self_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     return MP_OBJ_NEW_SMALL_INT(common_hal_displayio_display_get_height(self));
 }
 MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_get_height_obj, displayio_display_obj_get_height);
@@ -301,7 +307,7 @@ const mp_obj_property_t displayio_display_height_obj = {
 //|
 //|
 STATIC mp_obj_t displayio_display_obj_get_bus(mp_obj_t self_in) {
-    displayio_display_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    displayio_display_obj_t *self = native_display(self_in);
     return self->bus;
 }
 MP_DEFINE_CONST_FUN_OBJ_1(displayio_display_get_bus_obj, displayio_display_obj_get_bus);
diff --git a/shared-bindings/displayio/TileGrid.c b/shared-bindings/displayio/TileGrid.c
index 7c2c0d4ccc9d..2b41eb8fd5e9 100644
--- a/shared-bindings/displayio/TileGrid.c
+++ b/shared-bindings/displayio/TileGrid.c
@@ -103,7 +103,12 @@ STATIC mp_obj_t displayio_tilegrid_make_new(const mp_obj_type_t *type, size_t n_
         bitmap_width = bmp->width;
         bitmap_height = bmp->height;
     } else {
-        mp_raise_TypeError(translate("unsupported bitmap type"));
+        mp_raise_TypeError_varg(translate("unsupported %q type"), MP_QSTR_bitmap);
+    }
+    mp_obj_t pixel_shader = args[ARG_pixel_shader].u_obj;
+    if (!MP_OBJ_IS_TYPE(pixel_shader, &displayio_colorconverter_type) &&
+        !MP_OBJ_IS_TYPE(pixel_shader, &displayio_palette_type)) {
+        mp_raise_TypeError_varg(translate("unsupported %q type"), MP_QSTR_pixel_shader);
     }
     uint16_t tile_width = args[ARG_tile_width].u_int;
     if (tile_width == 0) {
@@ -126,7 +131,7 @@ STATIC mp_obj_t displayio_tilegrid_make_new(const mp_obj_type_t *type, size_t n_
     displayio_tilegrid_t *self = m_new_obj(displayio_tilegrid_t);
     self->base.type = &displayio_tilegrid_type;
     common_hal_displayio_tilegrid_construct(self, native, bitmap_width / tile_width,
-        args[ARG_pixel_shader].u_obj, args[ARG_width].u_int, args[ARG_height].u_int,
+        pixel_shader, args[ARG_width].u_int, args[ARG_height].u_int,
         tile_width, tile_height, x, y, args[ARG_default_tile].u_int);
     return MP_OBJ_FROM_PTR(self);
 }