diff --git a/keyboards/nacly/sodium42/keyboard.json b/keyboards/nacly/sodium42/keyboard.json
index a1d7b65ab30..97b6a837c54 100644
--- a/keyboards/nacly/sodium42/keyboard.json
+++ b/keyboards/nacly/sodium42/keyboard.json
@@ -35,8 +35,7 @@
             "pin": "D3"
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/nacly/sodium50/keyboard.json b/keyboards/nacly/sodium50/keyboard.json
index e41495755f4..dd1604c480f 100644
--- a/keyboards/nacly/sodium50/keyboard.json
+++ b/keyboards/nacly/sodium50/keyboard.json
@@ -35,8 +35,7 @@
             "pin": "D3"
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/nacly/sodium62/keyboard.json b/keyboards/nacly/sodium62/keyboard.json
index ab16bf45fa1..64cb488159b 100644
--- a/keyboards/nacly/sodium62/keyboard.json
+++ b/keyboards/nacly/sodium62/keyboard.json
@@ -36,8 +36,7 @@
             "pin": "D3"
         }
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/nacly/splitreus62/keyboard.json b/keyboards/nacly/splitreus62/keyboard.json
index d3565786904..567cb6d6db6 100644
--- a/keyboards/nacly/splitreus62/keyboard.json
+++ b/keyboards/nacly/splitreus62/keyboard.json
@@ -42,8 +42,7 @@
     "ws2812": {
       "pin": "B1"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
       "LAYOUT": {
         "layout": [
diff --git a/keyboards/nacly/ua62/keyboard.json b/keyboards/nacly/ua62/keyboard.json
index 0bf01308f50..85fbbd431ce 100644
--- a/keyboards/nacly/ua62/keyboard.json
+++ b/keyboards/nacly/ua62/keyboard.json
@@ -26,8 +26,7 @@
         "rows": ["D3", "D2", "D1", "D0", "D4"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
       "LAYOUT": {
         "layout": [
diff --git a/keyboards/newgame40/keyboard.json b/keyboards/newgame40/keyboard.json
index ad59f2bcd04..62c567cb409 100644
--- a/keyboards/newgame40/keyboard.json
+++ b/keyboards/newgame40/keyboard.json
@@ -39,8 +39,7 @@
   "ws2812": {
     "pin": "F6"
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "community_layouts": ["ortho_4x10"],
   "layouts": {
     "LAYOUT_ortho_4x10": {
diff --git a/keyboards/nightly_boards/n9/keyboard.json b/keyboards/nightly_boards/n9/keyboard.json
index e3d8a3be843..f99ff31258d 100644
--- a/keyboards/nightly_boards/n9/keyboard.json
+++ b/keyboards/nightly_boards/n9/keyboard.json
@@ -46,8 +46,7 @@
     "ws2812": {
         "pin": "F5"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/nightly_boards/ph_arisu/keyboard.json b/keyboards/nightly_boards/ph_arisu/keyboard.json
index afcbdd905af..7d64536c1ab 100644
--- a/keyboards/nightly_boards/ph_arisu/keyboard.json
+++ b/keyboards/nightly_boards/ph_arisu/keyboard.json
@@ -25,8 +25,7 @@
         "rows": ["D3", "D2", "D1", "D0", "D4", "C6", "D7", "E6", "B4", "B5"]
     },
     "diode_direction": "COL2ROW",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/np12/keyboard.json b/keyboards/np12/keyboard.json
index 435f2db3b7f..d12307f117f 100644
--- a/keyboards/np12/keyboard.json
+++ b/keyboards/np12/keyboard.json
@@ -25,8 +25,7 @@
       {"pin_a": "F4", "pin_b": "F5"}
     ]
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/numatreus/keyboard.json b/keyboards/numatreus/keyboard.json
index 3441a769e17..5a9df0f4298 100644
--- a/keyboards/numatreus/keyboard.json
+++ b/keyboards/numatreus/keyboard.json
@@ -33,8 +33,7 @@
     "led_count": 6,
     "max_brightness": 200
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/obosob/arch_36/keyboard.json b/keyboards/obosob/arch_36/keyboard.json
index 791c08d3f11..661d335daad 100644
--- a/keyboards/obosob/arch_36/keyboard.json
+++ b/keyboards/obosob/arch_36/keyboard.json
@@ -34,8 +34,7 @@
     "ws2812": {
         "pin": "D3"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "community_layouts": ["split_3x5_3"],
     "layouts": {
         "LAYOUT_split_3x5_3": {
diff --git a/keyboards/obosob/steal_this_keyboard/keyboard.json b/keyboards/obosob/steal_this_keyboard/keyboard.json
index 4865f542834..60abd1ecf97 100644
--- a/keyboards/obosob/steal_this_keyboard/keyboard.json
+++ b/keyboards/obosob/steal_this_keyboard/keyboard.json
@@ -8,8 +8,7 @@
         "pid": "0x50AD",
         "device_version": "0.0.1"
     },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "features": {
         "bootmagic": false,
         "extrakey": true,
diff --git a/keyboards/ocean/addon/keyboard.json b/keyboards/ocean/addon/keyboard.json
index 0793a7082a6..671c04cba05 100644
--- a/keyboards/ocean/addon/keyboard.json
+++ b/keyboards/ocean/addon/keyboard.json
@@ -19,8 +19,7 @@
         "rows": ["C6", "D7", "E6", "B4", "B5"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/ocean/gin_v2/keyboard.json b/keyboards/ocean/gin_v2/keyboard.json
index d20aa5916f1..08a7f29b8c7 100644
--- a/keyboards/ocean/gin_v2/keyboard.json
+++ b/keyboards/ocean/gin_v2/keyboard.json
@@ -18,8 +18,7 @@
         "rows": ["D1", "D0", "D4", "C6", "D7", "E6", "B4", "B5"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/ocean/slamz/keyboard.json b/keyboards/ocean/slamz/keyboard.json
index cf3ed54426a..65bc91eebee 100644
--- a/keyboards/ocean/slamz/keyboard.json
+++ b/keyboards/ocean/slamz/keyboard.json
@@ -18,8 +18,7 @@
         "rows": ["D2", "D1", "D0", "D4"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/ocean/stealth/keyboard.json b/keyboards/ocean/stealth/keyboard.json
index a15d2fffac6..0f0070de636 100644
--- a/keyboards/ocean/stealth/keyboard.json
+++ b/keyboards/ocean/stealth/keyboard.json
@@ -18,8 +18,7 @@
         "rows": ["D1"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/ocean/sus/keyboard.json b/keyboards/ocean/sus/keyboard.json
index 3ac426f6aae..ebbb2470352 100644
--- a/keyboards/ocean/sus/keyboard.json
+++ b/keyboards/ocean/sus/keyboard.json
@@ -19,8 +19,7 @@
       "rows": ["B5", "B4", "E6", "D7"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT_ortho_4x3": {
           "layout": [
diff --git a/keyboards/ocean/wang_ergo/keyboard.json b/keyboards/ocean/wang_ergo/keyboard.json
index d552028bc6a..e32f21d8028 100644
--- a/keyboards/ocean/wang_ergo/keyboard.json
+++ b/keyboards/ocean/wang_ergo/keyboard.json
@@ -18,8 +18,7 @@
         "rows": ["F4", "F5", "F6", "F7"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layout_aliases": {
         "LAYOUT": "LAYOUT_all"
     },
diff --git a/keyboards/ocean/wang_v2/keyboard.json b/keyboards/ocean/wang_v2/keyboard.json
index 79ef6b36979..e64345db2f0 100644
--- a/keyboards/ocean/wang_v2/keyboard.json
+++ b/keyboards/ocean/wang_v2/keyboard.json
@@ -18,8 +18,7 @@
         "rows": ["F4", "F5", "F6", "F7"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/ocean/yuri/keyboard.json b/keyboards/ocean/yuri/keyboard.json
index aeb4cd895df..fee89b9de70 100644
--- a/keyboards/ocean/yuri/keyboard.json
+++ b/keyboards/ocean/yuri/keyboard.json
@@ -19,8 +19,7 @@
         "rows": ["F4", "F5", "F6", "F7"]
     },
     "diode_direction": "ROW2COL",
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "layouts": {
         "LAYOUT": {
             "layout": [
diff --git a/keyboards/om60/keyboard.json b/keyboards/om60/keyboard.json
index 08eb898b014..d91f28f8af2 100644
--- a/keyboards/om60/keyboard.json
+++ b/keyboards/om60/keyboard.json
@@ -49,8 +49,7 @@
   "ws2812": {
     "pin": "D3"
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/omkbd/ergodash/info.json b/keyboards/omkbd/ergodash/info.json
index 306a3970bb8..18138dd692f 100644
--- a/keyboards/omkbd/ergodash/info.json
+++ b/keyboards/omkbd/ergodash/info.json
@@ -1,6 +1,5 @@
 {
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "split": {
         "enabled": true
     }
diff --git a/keyboards/omkbd/runner3680/info.json b/keyboards/omkbd/runner3680/info.json
index c626b2e3b45..e06cb1243c6 100644
--- a/keyboards/omkbd/runner3680/info.json
+++ b/keyboards/omkbd/runner3680/info.json
@@ -1,6 +1,5 @@
 {
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
+    "development_board": "promicro",
     "features": {
         "bootmagic": false,
         "extrakey": false,
diff --git a/keyboards/orthodox/rev1/keyboard.json b/keyboards/orthodox/rev1/keyboard.json
index 0444009f2bd..bd08fc19d2e 100644
--- a/keyboards/orthodox/rev1/keyboard.json
+++ b/keyboards/orthodox/rev1/keyboard.json
@@ -17,8 +17,7 @@
       "pin": "D0"
     }
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [
diff --git a/keyboards/orthodox/rev3/keyboard.json b/keyboards/orthodox/rev3/keyboard.json
index 61d8281f55a..411df12f982 100644
--- a/keyboards/orthodox/rev3/keyboard.json
+++ b/keyboards/orthodox/rev3/keyboard.json
@@ -17,8 +17,7 @@
       "pin": "D0"
     }
   },
-  "processor": "atmega32u4",
-  "bootloader": "caterina",
+  "development_board": "promicro",
   "layouts": {
     "LAYOUT": {
       "layout": [