diff --git a/keyboards/rainkeebs/rainkeeb/keyboard.json b/keyboards/rainkeebs/rainkeeb/keyboard.json
index 2d4a2ac5b98..b14ea45ddee 100644
--- a/keyboards/rainkeebs/rainkeeb/keyboard.json
+++ b/keyboards/rainkeebs/rainkeeb/keyboard.json
@@ -32,8 +32,7 @@
             {"pin_a": "B2", "pin_b": "B6"}
         ]
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/rart/rart4x4/keyboard.json b/keyboards/rart/rart4x4/keyboard.json
index a18e4a46062..13d7ca3345e 100644
--- a/keyboards/rart/rart4x4/keyboard.json
+++ b/keyboards/rart/rart4x4/keyboard.json
@@ -54,8 +54,7 @@
             {"pin_a": "D7", "pin_b": "E6"}
         ]
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "community_layouts": ["ortho_4x4"],
     "layouts": {
         "LAYOUT_ortho_4x4": {
diff --git a/keyboards/rart/rart67m/keyboard.json b/keyboards/rart/rart67m/keyboard.json
index bade7834fde..a9ab73ce57e 100644
--- a/keyboards/rart/rart67m/keyboard.json
+++ b/keyboards/rart/rart67m/keyboard.json
@@ -26,8 +26,7 @@
         "rows": ["D3", "D2", "D4", "F6", "B3", "B4", "B2", "B5"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layout_aliases": {
         "LAYOUT_all": "LAYOUT"
     },
diff --git a/keyboards/rart/rartlite/keyboard.json b/keyboards/rart/rartlite/keyboard.json
index df9180d622e..48325bf391e 100644
--- a/keyboards/rart/rartlite/keyboard.json
+++ b/keyboards/rart/rartlite/keyboard.json
@@ -29,8 +29,7 @@
         "num_lock": "F6",
         "on_state": 0
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT_right_numpad": {
             "layout": [
diff --git a/keyboards/rart/rartpad/keyboard.json b/keyboards/rart/rartpad/keyboard.json
index cc3f7120d2d..70195fc4bfd 100644
--- a/keyboards/rart/rartpad/keyboard.json
+++ b/keyboards/rart/rartpad/keyboard.json
@@ -57,8 +57,7 @@
       "twinkle": true
     }
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "community_layouts": ["ortho_5x4", "numpad_5x4"],
   "layouts": {
       "LAYOUT_ortho_5x4": {
diff --git a/keyboards/rate/pistachio_mp/keyboard.json b/keyboards/rate/pistachio_mp/keyboard.json
index 71e32445231..cea6190b842 100644
--- a/keyboards/rate/pistachio_mp/keyboard.json
+++ b/keyboards/rate/pistachio_mp/keyboard.json
@@ -39,8 +39,7 @@
             {"pin_a": "F4", "pin_b": "F5"}
         ]
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/recompile_keys/choco60/rev1/keyboard.json b/keyboards/recompile_keys/choco60/rev1/keyboard.json
index 4e5a8903bd4..6c0b3630116 100644
--- a/keyboards/recompile_keys/choco60/rev1/keyboard.json
+++ b/keyboards/recompile_keys/choco60/rev1/keyboard.json
@@ -19,6 +19,5 @@
             "pin": "D3"
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina"
+    "development_board": "promicro"
 }
diff --git a/keyboards/recompile_keys/cocoa40/keyboard.json b/keyboards/recompile_keys/cocoa40/keyboard.json
index 9fad026ea77..a576e54551b 100644
--- a/keyboards/recompile_keys/cocoa40/keyboard.json
+++ b/keyboards/recompile_keys/cocoa40/keyboard.json
@@ -28,8 +28,7 @@
             "pin": "D2"
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/recompile_keys/nomu30/rev1/keyboard.json b/keyboards/recompile_keys/nomu30/rev1/keyboard.json
index 01afb9fe7d5..8865eb0535a 100644
--- a/keyboards/recompile_keys/nomu30/rev1/keyboard.json
+++ b/keyboards/recompile_keys/nomu30/rev1/keyboard.json
@@ -10,6 +10,5 @@
         "rows": ["D1", "D0", "D4"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina"
+    "development_board": "promicro"
 }
diff --git a/keyboards/rect44/keyboard.json b/keyboards/rect44/keyboard.json
index c863bec9a3e..7e0202cde7f 100644
--- a/keyboards/rect44/keyboard.json
+++ b/keyboards/rect44/keyboard.json
@@ -37,8 +37,7 @@
         "rows": ["D3", "D2", "F5", "F4"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT_all": {
             "layout": [
diff --git a/keyboards/redox_media/keyboard.json b/keyboards/redox_media/keyboard.json
index dba5657ea2f..145d9116caf 100644
--- a/keyboards/redox_media/keyboard.json
+++ b/keyboards/redox_media/keyboard.json
@@ -36,8 +36,7 @@
             "pin": "D0"
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/reviung/reviung34/keyboard.json b/keyboards/reviung/reviung34/keyboard.json
index 7495b7cc9d9..d7e6fe422a6 100755
--- a/keyboards/reviung/reviung34/keyboard.json
+++ b/keyboards/reviung/reviung34/keyboard.json
@@ -26,8 +26,7 @@
         "rows": ["F4", "F5", "F6", "F7"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "community_layouts": [
         "split_3x5_2"
     ],
diff --git a/keyboards/reviung/reviung39/keyboard.json b/keyboards/reviung/reviung39/keyboard.json
index e18c1c163e1..b57100d1eb1 100644
--- a/keyboards/reviung/reviung39/keyboard.json
+++ b/keyboards/reviung/reviung39/keyboard.json
@@ -49,8 +49,7 @@
         "rows": ["F4", "F5", "F6", "F7", "B1", "B3", "B2"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layout_aliases": {
         "LAYOUT_reviung39": "LAYOUT"
     },
diff --git a/keyboards/reviung/reviung41/keyboard.json b/keyboards/reviung/reviung41/keyboard.json
index b44827c3d29..f0ad524da2b 100644
--- a/keyboards/reviung/reviung41/keyboard.json
+++ b/keyboards/reviung/reviung41/keyboard.json
@@ -49,8 +49,7 @@
         "rows": ["F4", "F5", "F6", "F7", "B1", "B3", "B2"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layout_aliases": {
         "LAYOUT_reviung41": "LAYOUT"
     },
diff --git a/keyboards/reviung/reviung5/keyboard.json b/keyboards/reviung/reviung5/keyboard.json
index 7e7101c0abc..014cbb288a8 100644
--- a/keyboards/reviung/reviung5/keyboard.json
+++ b/keyboards/reviung/reviung5/keyboard.json
@@ -53,8 +53,7 @@
             {"pin_a": "D0", "pin_b": "D1"}
         ]
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layout_aliases": {
         "LAYOUT_reviung5": "LAYOUT"
     },
diff --git a/keyboards/reviung/reviung53/keyboard.json b/keyboards/reviung/reviung53/keyboard.json
index 15f896e7d4e..0468912f82f 100644
--- a/keyboards/reviung/reviung53/keyboard.json
+++ b/keyboards/reviung/reviung53/keyboard.json
@@ -47,8 +47,7 @@
         "rows": ["D0", "D4", "C6", "D7", "E6", "B4", "B5"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layout_aliases": {
         "LAYOUT_reviung53": "LAYOUT"
     },
diff --git a/keyboards/rgbkb/zen/rev1/keyboard.json b/keyboards/rgbkb/zen/rev1/keyboard.json
index b35381f607f..94164016bb8 100644
--- a/keyboards/rgbkb/zen/rev1/keyboard.json
+++ b/keyboards/rgbkb/zen/rev1/keyboard.json
@@ -38,8 +38,7 @@
   "ws2812": {
     "pin": "D1"
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/rgbkb/zen/rev2/keyboard.json b/keyboards/rgbkb/zen/rev2/keyboard.json
index 917274f1869..d34fd7afb13 100644
--- a/keyboards/rgbkb/zen/rev2/keyboard.json
+++ b/keyboards/rgbkb/zen/rev2/keyboard.json
@@ -56,8 +56,7 @@
     "ws2812": {
       "pin": "B6"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
       "LAYOUT": {
         "layout": [
diff --git a/keyboards/rpiguy9907/southpaw66/keyboard.json b/keyboards/rpiguy9907/southpaw66/keyboard.json
index c751ee6d8e4..980d2178065 100644
--- a/keyboards/rpiguy9907/southpaw66/keyboard.json
+++ b/keyboards/rpiguy9907/southpaw66/keyboard.json
@@ -35,8 +35,7 @@
     "tapping": {
         "term": 400
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/rura66/rev1/keyboard.json b/keyboards/rura66/rev1/keyboard.json
index cb9ad6f29a5..3dc41aabd4c 100644
--- a/keyboards/rura66/rev1/keyboard.json
+++ b/keyboards/rura66/rev1/keyboard.json
@@ -55,8 +55,7 @@
     "ws2812": {
         "pin": "D3"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/ryanbaekr/rb1/keyboard.json b/keyboards/ryanbaekr/rb1/keyboard.json
index a7222869e06..8b1b1a5a82c 100644
--- a/keyboards/ryanbaekr/rb1/keyboard.json
+++ b/keyboards/ryanbaekr/rb1/keyboard.json
@@ -7,8 +7,7 @@
         "pid": "0x0001",
         "device_version": "0.0.3"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "features": {
         "bootmagic": true,
         "extrakey": true,